dos

Public/static/css/index.css

@@ -54,6 +54,11 @@ input[name=username] {
   font-family: 'fzlt';
 }
 
+.canvas-block {
+  background: url('../image2/poster.png') left top no-repeat;
+  background-size: 100% 100%;
+}
+
 canvas {
   width: 15.75rem;
   height: 15.8rem;