image loading probably works now

index.php

@@ -101,9 +101,11 @@
                 const ctx = canvas.getContext("2d");
 
                 const copy = ctx.createImageData(128, 64);
-                for (let i = 0; i < pen.data.length; i += 4) {
+                for (let i = 0; i < copy.data.length; i += 4) {
+                    if (substr(bits, i/4, 1) == "1") {
                         copy.data[i+3] = 255;
                     }
+                }
 
                 ctx.putImageData(copy, 0, 0);
             }