diff --git a/mods/customexplosion.js b/mods/customexplosion.js
new file mode 100644
index 00000000..02367ce2
--- /dev/null
+++ b/mods/customexplosion.js
@@ -0,0 +1,127 @@
+//How to use this:
+//in the reactions of an element, this is what it could look like:
+//reactions: { "water": elem1: "CustomExplosion", items: "fire,fire,hydrogen,sodiumhydroxide" }
+//OR
+//reactions: { "water": elem1: "CustomExplosion", items: "EX:10>fire,fire,hydrogen.sodiumhydroxide" } (this one has a customizeable blast radius)
+function reactPixels(pixel1,pixel2) {
+    var r = elements[pixel1.element].reactions[pixel2.element];
+    if (r.setting && settings[r.setting]===0) {
+        return false;
+    }
+    // r has the attribute "y" which is a range between two y values
+    // r.y example: [10,30]
+    // return false if y is defined and pixel1's y is not in the range
+    if (r.tempMin !== undefined && pixel1.temp < r.tempMin) {
+        return false;
+    }
+    if (r.tempMax !== undefined && pixel1.temp > r.tempMax) {
+        return false;
+    }
+    if (r.burning1 !== undefined && Boolean(pixel1.burning) !== r.burning1) {
+        return false;
+    }
+    if (r.burning2 !== undefined && Boolean(pixel2.burning) !== r.burning2) {
+        return false;
+    }
+    if (r.charged && !pixel.charge) {
+        return false;
+    }
+    if (r.chance !== undefined && Math.random() > r.chance) {
+        return false;
+    }
+    if (r.y !== undefined && (pixel1.y < r.y[0] || pixel1.y > r.y[1])) {
+        return false;
+    }
+    if (r.elem1 !== undefined) {
+        // if r.elem1 is an array, set elem1 to a random element from the array, otherwise set it to r.elem1
+        if (Array.isArray(r.elem1)) {
+            var elem1 = r.elem1[Math.floor(Math.random() * r.elem1.length)];
+            if(elem1 == "customExplosion"){
+              if(r.items !== undefined){
+                elements.customExplosion.rItems = r.items
+              } else{
+                return false;
+              }
+            }
+        } else { 
+          var elem1 = r.elem1;
+          if(elem1 == "customExplosion"){
+            if(r.items !== undefined){
+              elements.customExplosion.rItems = r.items
+            } else{
+              return false;
+            }
+          }
+        }
+
+        if (elem1 == null) {
+            deletePixel(pixel1.x,pixel1.y);
+        }
+        else {
+          changePixel(pixel1,elem1);
+        }
+    }
+    if (r.charge1) { pixel1.charge = r.charge1; }
+    if (r.temp1) { pixel1.temp += r.temp1; pixelTempCheck(pixel1); }
+    if (r.color1) { // if it's a list, use a random color from the list, else use the color1 attribute
+        pixel1.color = pixelColorPick(pixel1, Array.isArray(r.color1) ? r.color1[Math.floor(Math.random() * r.color1.length)] : r.color1);
+    }
+    if (r.attr1) { // add each attribute to pixel1
+        for (var key in r.attr1) {
+            pixel1[key] = r.attr1[key];
+        }
+    }
+    if (r.elem2 !== undefined) {
+        // if r.elem2 is an array, set elem2 to a random element from the array, otherwise set it to r.elem2
+        if (Array.isArray(r.elem2)) {
+            var elem2 = r.elem2[Math.floor(Math.random() * r.elem2.length)];
+        } else { var elem2 = r.elem2; }
+
+        if (elem2 == null) {
+            deletePixel(pixel2.x,pixel2.y);
+        }
+        else {
+            changePixel(pixel2,elem2);
+        }
+    }
+    if (r.charge2) { pixel2.charge = r.charge2; }
+    if (r.temp2) { pixel2.temp += r.temp2; pixelTempCheck(pixel2); }
+    if (r.color2) { // if it's a list, use a random color from the list, else use the color2 attribute
+        pixel2.color = pixelColorPick(pixel2, Array.isArray(r.color2) ? r.color2[Math.floor(Math.random() * r.color2.length)] : r.color2);
+    }
+    if (r.attr2) { // add each attribute to pixel2
+        for (var key in r.attr2) {
+            pixel2[key] = r.attr2[key];
+        }
+    }
+    if (r.func) { r.func(pixel1,pixel2); }
+    return r.elem1!==undefined || r.elem2!==undefined;
+}
+elements.CustomExplosion = {
+  items: "",
+  rItems: "",
+  behavior: behaviors.SOLID,
+  state: "solid",
+  onSelect: function(){
+    items = prompt("What should this explosion include?");
+    this.items = items;
+    console.log(items);
+    elements.customExplosion.behavior = [["XX", "XX", "XX"], ["XX", `EX:4>${items}`, "XX"], ["XX", "XX", "XX"]]
+  },
+  tick: function(pixel){
+    let items = elements.customExplosion.rItems;
+    if (items !== ""){
+      items = elements.customExplosion.rItems;
+    } else {
+      items = elements.customExplosion.items;
+    }
+
+    console.log(items)
+    if(!items.includes("EX:")){
+      elements.customExplosion.behavior = [["XX", "XX", "XX"], ["XX", `EX:4>${items}`, "XX"], ["XX", "XX", "XX"]]
+    } else{
+      elements.customExplosion.behavior = [["XX", "XX", "XX"], ["XX", items, "XX"], ["XX", "XX", "XX"]]
+    }
+
+  }
+}