update,

_resources/_ref/background-p5js/background_test/index.js

@@ -0,0 +1,16 @@
+let img;
+
+function preload() {
+  img = loadImage("python.jpg");
+}
+
+function setup() {
+  const canvas = createCanvas(windowWidth - 20, windowHeight - 200);
+  canvas.parent(document.querySelector("#canvas"));
+
+  for (let i = 0; i < 100; i += 50) {
+    for (let j = 0; j < 100; j += 50) {
+      image(img, i, j, 45, 45);
+    }
+  }
+}