code: function _fill_canvas(canvas, items) {
              var ctx = canvas.getContext('2d');
              ctx.fillStyle = '#ddd';
  
              for (var i = 0; i < ITEM_COUNT; i++) {
                  var asset = items[i];
                  ctx.save();
                  ctx.shadowColor = "rgba(0,0,0,0.5)";
                  ctx.shadowOffsetX = 5;
                  ctx.shadowOffsetY = 5;
                  ctx.shadowBlur = 5;
                  ctx.drawImage(asset.img, 3, i * SLOT_HEIGHT + IMAGE_TOP_MARGIN);
                  ctx.drawImage(asset.img, 3, (i + ITEM_COUNT) * SLOT_HEIGHT + IMAGE_TOP_MARGIN);
                  ctx.restore();
                  ctx.fillRect(0, i * SLOT_HEIGHT, 70, SLOT_SEPARATOR_HEIGHT);
                  ctx.fillRect(0, (i + ITEM_COUNT) * SLOT_HEIGHT, 70, SLOT_SEPARATOR_HEIGHT);
              }
          }
docs: all loaded draws canvas strip