1 files changed, 41 insertions, 0 deletions
diff --git a/src/entities/hello_kitty_background.js b/src/entities/hello_kitty_background.js
new file mode 100644
index 0000000..4d9a81f
--- /dev/null
+++ b/src/entities/hello_kitty_background.js
@@ -0,0 +1,41 @@
+import { Vector } from "../engine/vector.js"
+import { BACKGROUND } from "../assets.js"
+import { Entity } from "../entities/entity.js"
+import { Engine } from "../engine.js"
+
+export class HelloKittyBackground extends Entity {
+    speed = 20
+    stage = 0
+
+    constructor(position = null) {
+        let size = new Vector(1300, 2080)
+        let x_margin = 0
+        if (position == null) position = new Vector(
+                size.x / 2 + Engine.screen.viewport / 2 - x_margin,
+                - (size.y / 2) + Engine.screen.viewport.y,
+        )
+        super({
+            //size: new Vector(650, 1040),
+            size: size,
+            position: position,
+            sprite: BACKGROUND.KITTY,
+        })
+        this.span.style.zIndex = -3
+        this.max_down = (this.size.y / 2)
+        this.x_margin = x_margin
+    }
+
+    update() {
+        this.position.y += this.speed
+        if (this.stage == 0 && this.position.y > this.max_down) {
+            let margin = this.position.y - this.max_down
+            let newPos = new Vector(
+                this.size.x / 2 - this.x_margin,
+                - (this.size.y / 2) + margin
+            )
+
+            new HelloKittyBackground(newPos)
+            this.stage++
+        }
+    }
+}