Create enemy.js

enemy.js

@@ -0,0 +1,24 @@
+class Enemy {
+  constructor(x, y) {
+    this.x = x;
+    this.y = y;
+    this.size = 30;
+    this.speed = 1;
+  }
+
+  update() {
+    this.move();
+    this.draw();
+  }
+
+  move() {
+    this.y += this.speed;
+  }
+
+  draw() {
+    ctx.beginPath();
+    ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2);
+    ctx.fillStyle = 'red';
+    ctx.fill();
+  }
+}