diff --git a/mods/creepers.js b/mods/creepers.js
new file mode 100644
index 00000000..a29c118d
--- /dev/null
+++ b/mods/creepers.js
@@ -0,0 +1,381 @@
+function pyth(xA,yA,xB,yB) {
+    var a = Math.abs(xB - xA);
+    var b = Math.abs(yB - yA);
+    var c = Math.sqrt(a**2 + b**2);
+    return c;
+};
+
+elements.creeper = {
+	color: ["#D2D2D2", "#BFDFB9", "#94CE89", "#78D965", "#5ED54C", "#58C546", "#50B143", "#479143", "#559552", "#3F8738", "#5B8B59"],
+	category: "life",
+	properties: {
+		dead: false,
+		dir: 1,
+		panic: 0,
+		following: false,
+	},
+	tick: function(pixel) {
+		if (isEmpty(pixel.x, pixel.y+1)) {
+			createPixel("creeper_body", pixel.x, pixel.y+1);
+			pixel.element = "creeper_head";
+		}
+		else if (isEmpty(pixel.x, pixel.y-1)) {
+			createPixel("creeper_head", pixel.x, pixel.y-1);
+			pixelMap[pixel.x][pixel.y-1].color = pixel.color;
+			pixel.element = "creeper_body";
+			pixel.color = pixelColorPick(pixel)
+		}
+		else {
+			deletePixel(pixel.x, pixel.y);
+		}
+	},
+	related: ["creeper_body","creeper_head"],
+};
+
+elements.creeper_body = {
+	color: ["#D2D2D2", "#BFDFB9", "#94CE89", "#78D965", "#5ED54C", "#58C546", "#50B143", "#479143", "#559552", "#3F8738", "#5B8B59"],
+	category: "life",
+	hidden: true,
+	density: 1500,
+	state: "solid",
+	conduct: 25,
+	tempHigh: 250,
+	stateHigh: "cooked_meat",
+	tempLow: -30,
+	stateLow: "frozen_meat",
+	burn: 10,
+	burnTime: 250,
+	burnInto: "cooked_meat",
+	breakInto: ["blood","gunpowder"],
+	reactions: {
+		"cancer": { "elem1":"cancer", "chance":0.005 },
+		"radiation": { "elem1":["ash","meat","rotten_meat","cooked_meat"], "chance":0.4 },
+		"plague": { "elem1":"plague", "chance":0.05 },
+	},
+	properties: {
+		dead: false,
+		dir: 1,
+		panic: 0,
+		charged: false,
+	},
+	tick: function(pixel) {
+		if (tryMove(pixel, pixel.x, pixel.y+1)) { // Fall
+			if (!isEmpty(pixel.x, pixel.y-2, true)) { // Drag head down
+				var headpixel = pixelMap[pixel.x][pixel.y-2];
+				if (headpixel.element == "creeper_head") {
+					if (isEmpty(pixel.x, pixel.y-1)) {
+						movePixel(pixelMap[pixel.x][pixel.y-2], pixel.x, pixel.y-1);
+					}
+					else {
+						swapPixels(pixelMap[pixel.x][pixel.y-2], pixelMap[pixel.x][pixel.y-1]);
+					}
+				}
+			}
+		}
+		doHeat(pixel);
+		doBurning(pixel);
+		doElectricity(pixel);
+		if (pixel.dead) {
+			// Turn into rotten_meat if pixelTicks-dead > 500
+			if (pixelTicks-pixel.dead > 200) {
+				Math.random() < 0.1 ? changePixel(pixel,"gunpowder") : changePixel(pixel,"rotten_meat");
+			}
+			return
+		}
+
+		// Find the head
+		if (!isEmpty(pixel.x, pixel.y-1, true) && pixelMap[pixel.x][pixel.y-1].element == "creeper_head") {
+			var head = pixelMap[pixel.x][pixel.y-1];
+			if (head.dead) { // If head is dead, kill body
+				pixel.dead = head.dead;
+			}
+		}
+		else { var head = null }
+
+		if (isEmpty(pixel.x, pixel.y-1)) {
+			// create blood if decapitated 10% chance
+			if (Math.random() < 0.1) {
+				createPixel("blood", pixel.x, pixel.y-1);
+				// set dead to true 15% chance
+				if (Math.random() < 0.15) {
+					pixel.dead = pixelTicks;
+				}
+			}
+		}
+		else if (head == null) { return }
+		else if (Math.random() < 0.1) { // Move 10% chance
+			var movesToTry = [
+				[1*pixel.dir,0],
+				[1*pixel.dir,-1],
+			];
+			// While movesToTry is not empty, tryMove(pixel, x, y) with a random move, then remove it. if tryMove returns true, break.
+			while (movesToTry.length > 0) {
+				var move = movesToTry.splice(Math.floor(Math.random() * movesToTry.length), 1)[0];
+				if (isEmpty(pixel.x+move[0], pixel.y+move[1]-1)) {
+					if (tryMove(pixel, pixel.x+move[0], pixel.y+move[1])) {
+						movePixel(head, head.x+move[0], head.y+move[1]);
+						break;
+					};
+				};
+			};
+			// 15% chance to change direction while not chasing a human
+			if(!head.following) {
+				if (Math.random() < 0.15) {
+					pixel.dir *= -1;
+					//console.log("*turns around cutely to face ${pixel.dir < 0 ? 'left' : 'right'}*");
+				};
+			} else {
+				//console.log("*chases cutely*");
+			};
+		};
+
+		if(pixel.charge) {
+			pixel.charged = true;
+		};
+		
+		if(head) {
+			if(typeof(head.charge) !== "undefined") {
+				if(head.charge) {
+					pixel.charged = true;
+				};
+			};
+			if(typeof(head.charged) !== "undefined") {
+				if(head.charged) {
+					pixel.charged = true;
+				};
+			};
+		};
+
+		if(typeof(pixel.charged) === "undefined") {
+			pixel.charged = false;
+		};
+
+		if(pixel.charged) {
+			var explosionRadius = 10;
+		} else {
+			var explosionRadius = 7;
+		};
+		
+		if(pixel.burning) {
+			if(!pixel.burnStart) { //I don't like errors.
+				pixel.burnStart = pixel.ticks;
+			};
+			if(pixelTicks - pixel.burnStart > explosionRadius) {
+				//console.log("Kaboom?");
+				explodeAt(pixel.x,pixel.y,7);
+				//console.log("Yes, Rico, kaboom.");
+			};
+		};
+	},
+},
+elements.creeper_head = {
+	color: ["#5B8B59", "#3F8738", "#559552", "#479143", "#50B143", "#58C546"],
+	category: "life",
+	hidden: true,
+	density: 1080,
+	state: "solid",
+	conduct: 25,
+	tempHigh: 250,
+	stateHigh: "cooked_meat",
+	tempLow: -30,
+	stateLow: "frozen_meat",
+	burn: 10,
+	burnTime: 250,
+	burnInto: "cooked_meat",
+	breakInto: "blood",
+	reactions: {
+		"cancer": { "elem1":"cancer", "chance":0.005 },
+		"radiation": { "elem1":["ash","meat","rotten_meat","cooked_meat"], "chance":0.4 },
+		"plague": { "elem1":"plague", "chance":0.05 },
+		"oxygen": { "elem2":"carbon_dioxide", "chance":0.5 },
+	},
+	properties: {
+		dead: false,
+		following: false,
+		hissing: false,
+		charged: false,
+	},
+	tick: function(pixel) {
+		doHeat(pixel);
+		doBurning(pixel);
+		doElectricity(pixel);
+		if (pixel.dead) {
+			// Turn into rotten_meat if pixelTicks-dead > 500
+			if (pixelTicks-pixel.dead > 200) {
+				Math.random() < 0.1 ? changePixel(pixel,"gunpowder") : changePixel(pixel,"rotten_meat");
+				return
+			}
+		}
+
+		// Find the body
+		if (!isEmpty(pixel.x, pixel.y+1, true) && pixelMap[pixel.x][pixel.y+1].element == "creeper_body") {
+			var body = pixelMap[pixel.x][pixel.y+1];
+			if (body.dead) { // If body is dead, kill head
+				pixel.dead = body.dead;
+			}
+		}
+		else { var body = null }
+
+		if(body) {
+			if(body.dir !== pixel.dir) { //hacky workaround: lock head dir to body dir
+				pixel.dir = body.dir;
+			};
+		};
+
+		if (isEmpty(pixel.x, pixel.y+1)) {
+			tryMove(pixel, pixel.x, pixel.y+1);
+			// create blood if severed 10% chance
+			if (isEmpty(pixel.x, pixel.y+1) && !pixel.dead && Math.random() < 0.1) {
+				createPixel("blood", pixel.x, pixel.y+1);
+				// set dead to true 15% chance
+				if (Math.random() < 0.15) {
+					pixel.dead = pixelTicks;
+				}
+			}
+		}
+		
+		//start of most new code
+		var pX = pixel.x;
+		var pY = pixel.y;
+		
+		if(pixel.charge) {
+			pixel.charged = true;
+		};
+		
+		if(body) {
+			if(typeof(body.charge) !== "undefined") {
+				if(body.charge) {
+					pixel.charged = true;
+				};
+			};
+			if(typeof(body.charged) !== "undefined") {
+				if(body.charged) {
+					pixel.charged = true;
+				};
+			};
+		};
+		
+		if(typeof(pixel.charged) === "undefined") {
+			pixel.charged = false;
+		};
+
+		if(pixel.charged) {
+			var explosionRadius = 10;
+		} else {
+			var explosionRadius = 7;
+		};
+		
+		//Human detection loop (looks ahead according to direction and sets the "following" variable to true, telling the body to lock the direction)
+		var directionAdverb = "left";
+		if(pixel.dir > 0) {
+			directionAdverb = "right";
+		};
+		//console.log(`Looking ${directionAdverb}`)
+		if(pixel.dir === -1) {
+			for(i = -4; i < 4+1; i++) {
+				var oY = i;
+				//console.log(`Starting row look at row ${pY+oY}`)
+				for(j = (-1); j > (-16 - 1); j--) {
+					var oX = j;
+					var nX = pX+oX;
+					var nY = pY+oY;
+					if(outOfBounds(nX,nY)) {
+						//console.log(`Stopping row look at pixel (${nX},${nY}) due to OoB`)
+						break;
+					};
+					if(isEmpty(nX,nY)) {
+						////console.log(`Skipping pixel (${nX},${nY}) (empty)`)
+						continue;
+					};
+					if(!isEmpty(nX,nY,true)) {
+						var newPixel = pixelMap[nX][nY];
+						var newElement = newPixel.element;
+						if(["head","body"].includes(newElement)) {
+							//console.log(`Human part found at (${nX},${nY})`)
+							if(!newPixel.dead) {
+								pixel.following = true;
+								//console.log(`Human detected at (${nX},${nY})`)
+								//Start "hissing" if a human is close enough
+								if(pyth(pX,pY,nX,nY) <= 3.15) { //probably misapplying the tolerance from the MC Wiki line: "Creepers will chase after any player, as long as it is within a 16 block (±5%) radius"
+									pixel.hissing = true;
+									if(!pixel.hissStart) {
+										pixel.hissStart = pixelTicks;
+									};
+								};
+							};
+						} else {
+							//console.log(`Stopping row look at pixel (${nX},${nY}) due to non-human pixel in the way`)
+							break;
+						};
+					};
+				};
+			};
+		} else if(pixel.dir === 1) {
+			for(i = -4; i < 4+1; i++) {
+				var oY = i;
+				//console.log(`Starting row look at row ${pY+oY}`)
+				for(j = 1; j < 16 + 1; j++) {
+					var oX = j;
+					var nX = pX+oX;
+					var nY = pY+oY;
+					if(outOfBounds(nX,nY)) {
+						//console.log(`Stopping row look at pixel (${nX},${nY}) due to OoB`)
+						break;
+					};
+					if(isEmpty(nX,nY)) {
+						////console.log(`Skipping pixel (${nX},${nY}) (empty)`)
+						continue;
+					};
+					if(!isEmpty(nX,nY,true)) {
+						var newPixel = pixelMap[nX][nY];
+						var newElement = newPixel.element;
+						if(["head","body"].includes(newElement)) {
+							//console.log(`Human part found at (${nX},${nY})`)
+							if(!newPixel.dead) {
+								pixel.following = true;
+								//console.log(`Human detected at (${nX},${nY})`)
+								//Start "hissing" if a human is close enough
+								if(pyth(pX,pY,nX,nY) <= 3.15) {
+									pixel.hissing = true;
+									if(!pixel.hissStart) {
+										pixel.hissStart = pixelTicks;
+									};
+								};
+							};
+						} else {
+							//console.log(`Stopping row look at pixel (${nX},${nY}) due to non-human pixel in the way`)
+							break;
+						};
+					};
+				};
+			};
+		};
+		
+		//Pre-explosion handler: keeps track of time before the kaboom
+		for(i = 0; i < 1; i++) { //dummy for loop
+			if(pixel.hissing) {
+				//console.log("Ssssssss");
+				if(pixel.dead || !body || body.dead) { //can't explode without a body according to the classic creeper anatomy
+					//console.log("ss-- oof");
+					pixel.hissing = false;
+					break;
+				};
+				if(!pixel.hissStart) {
+					//console.log("t-30 ticks or whatever it was");
+					pixel.hissStart = pixelTicks;
+				};
+				if(pixelTicks - pixel.hissStart > 30) {
+					//console.log("Kaboom?");
+					//console.log(`Exploding with radius ${explosionRadius} (charged: ${pixel.charged})`);
+					explodeAt(body.x,body.y,explosionRadius);
+					//console.log("Yes, Rico, kaboom.");
+				};
+			};
+		};
+		
+		if(Math.random() < 0.01) { //1% chance each tick to lose interest
+			pixel.following = false;
+			//console.log("Meh.");
+		};
+	},
+};
\ No newline at end of file