diff --git a/mods/gasdecay.js b/mods/gasdecay.js
new file mode 100644
index 00000000..11db2630
--- /dev/null
+++ b/mods/gasdecay.js
@@ -0,0 +1,15 @@
+let gasList = []
+runAfterLoad(function(){
+    for (let _element in elements){
+        if (elements[_element].state == "gas"){
+            gasList.push(_element)
+        }
+    }
+    runPerPixel(function(pixel){
+        if (gasList.indexOf(pixel.element) >= 0){
+            if (Math.random() < 0.002){
+                deletePixel(pixel.x, pixel.y)
+            }
+        }
+    })
+})
\ No newline at end of file