diff --git a/mods/devtests.js b/mods/devtests.js
index e69de29b..a1606866 100644
--- a/mods/devtests.js
+++ b/mods/devtests.js
@@ -0,0 +1,53 @@
+elements.earthquake = {
+    color: ["#bda791","#997756","#613d19"],
+    tick: function(pixel) {
+        if (pixel.stage) {
+            var coords = circleCoords(pixel.x,pixel.y,pixel.stage);
+            if (pixel.stage >= pixel.mag) {
+                deletePixel(pixel.x,pixel.y);
+                return;
+            }
+            coords.forEach(function(coord){
+                var x = coord.x;
+                var y = coord.y;
+                if (!isEmpty(x,y,true)) {
+                    var p = pixelMap[x][y];
+                    if (p.element === "earthquake") { return }
+                    if (elements[p.element].breakInto) {
+                        // times 0.25 if not shiftDown else 1
+                        if (Math.random() < (elements[p.element].hardness || 1) * (shiftDown ? 1 : 0.25)) {
+                            var breakInto = elements[p.element].breakInto;
+                            // if breakInto is an array, pick one
+                            if (Array.isArray(breakInto)) {
+                                breakInto = breakInto[Math.floor(Math.random() * breakInto.length)];
+                            }
+                            if (breakInto === null) {
+                                deletePixel(p.x,p.y);
+                                return;
+                            }
+                            var oldelement = p.element;
+                            changePixel(p,breakInto);
+                            if (elements[oldelement].breakIntoColor) {
+                                p.color = pixelColorPick(p, elements[oldelement].breakIntoColor);
+                            }
+                        }
+                    }
+                    if (!elements[p.element].movable) { return }
+                    tryMove(p,p.x,p.y-1);
+                }
+            })
+            pixel.stage++;
+        }
+        else if (!tryMove(pixel,pixel.x,pixel.y+1)) {
+            // random 10 to 20
+            pixel.mag = Math.floor(Math.random() * 10) + 20;
+            pixel.stage = 1;
+        }
+    },
+    category: "weapons",
+    state: "solid",
+    density: 100000000,
+    maxSize: 1,
+    cooldown: defaultCooldown,
+    excludeRandom: true,
+}
\ No newline at end of file