diff --git a/mods/structure_test.js b/mods/structure_test.js
index 30349115..59ced9fb 100644
--- a/mods/structure_test.js
+++ b/mods/structure_test.js
@@ -1,8 +1,9 @@
 elements.room = {
 	name: "Room",
 	color: "#ffffff",
+	arr: [],
 	tick: function(pixel) {
-		arr =[["brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "glass",  "glass",  "glass",  "glass",  "glass",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick"],
+	pixel.arr=[["brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "glass",  "glass",  "glass",  "glass",  "glass",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick"],
 			  ["brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "glass",  "glass",  "glass",  "glass",  "glass",  "brick",  "battery","brick",  "brick",  "brick",  "brick",  "brick"],
 			  ["glass",  "glass",  "air",    "air",    "air",    "air",    "air",    "air",    "air",    "air",    "air",    "air",   "light","light_bulb","air",    "air",    "air",    "glass",  "glass"],
 			  ["glass",  "glass",  "light",  "light",  "air",    "air",    "air",    "air",    "air",    "air",    "air",    "air",    "air",    "light",  "air",    "air",    "air",    "glass",  "glass"],
@@ -15,37 +16,37 @@ elements.room = {
 			  ["brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick"],
 			  ["brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick",  "brick"]]
 
-/*arr = [["brick","brick","brick","brick","brick"], //(Test Array)
+/*pixel.arr = [["brick","brick","brick","brick","brick"], //(Test pixel.array)
  ["brick","air",  "iron", "air",  "brick"],
  ["brick","iron", "air",  "iron", "brick"],
  ["brick","air",  "air",  "air",  "brick"],
  ["brick","brick","brick","brick","brick"]]*/
 
-		aa = (0 - (Math.floor(arr[0].length / 2)))
+		aa = (0 - (Math.floor(pixel.arr[0].length / 2)))
 		na = Math.abs(aa)
-		if(arr[0].length % 2 == 1) {
-			bb = ((Math.floor(arr[0].length / 2)) + 1)
-		} else if(arr[0].length % 2 == 0) {
-			bb = (Math.floor(arr[0].length / 2))
+		if(pixel.arr[0].length % 2 == 1) {
+			bb = ((Math.floor(pixel.arr[0].length / 2)) + 1)
+		} else if(pixel.arr[0].length % 2 == 0) {
+			bb = (Math.floor(pixel.arr[0].length / 2))
 		}
 
-		cc = (0 - (Math.floor(arr.length / 2)))
+		cc = (0 - (Math.floor(pixel.arr.length / 2)))
 		nc = Math.abs(cc)
-		if(arr.length % 2 == 1) {
-			dd = ((Math.floor(arr.length / 2)) + 1)
-		} else if(arr.length % 2 == 0) {
-			dd = (Math.floor(arr.length / 2))
+		if(pixel.arr.length % 2 == 1) {
+			dd = ((Math.floor(pixel.arr.length / 2)) + 1)
+		} else if(pixel.arr.length % 2 == 0) {
+			dd = (Math.floor(pixel.arr.length / 2))
 		}
 		for (let j = cc; j < dd; j++) {
 			for (let i = aa; i < bb; i++) {
 				if(!isEmpty(pixel.x+i,pixel.y+j) && !outOfBounds(pixel.x+i,pixel.y+j)) {
-					if(arr[j+nc][i+na] != "null" || arr[j+nc][i+na] == "air") {
+					if(pixel.arr[j+nc][i+na] != "null" || pixel.arr[j+nc][i+na] == "air") {
 						deletePixel(pixel.x+i,pixel.y+j)
 					}
 				}
-				if(arr[j+nc][i+na]) {
-					if(isEmpty(pixel.x+i,pixel.y+j) && arr[j+nc][i+na] != "null" && arr[j+nc][i+na] != "air" && !outOfBounds(pixel.x+i,pixel.y+j)) {
-						createPixel(arr[j+nc][i+na],pixel.x+i,pixel.y+j)
+				if(pixel.arr[j+nc][i+na]) {
+					if(isEmpty(pixel.x+i,pixel.y+j) && pixel.arr[j+nc][i+na] != "null" && pixel.arr[j+nc][i+na] != "air" && !outOfBounds(pixel.x+i,pixel.y+j)) {
+						createPixel(pixel.arr[j+nc][i+na],pixel.x+i,pixel.y+j)
 					}
 				}
 			}