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Create circus-bounce.md

sensei-guide-pro/orange/circus-bounce.md

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+# Circus Bounce
+
+> `scene`, Initialize When Scene Starts
+
+```js
+$this.startSpeed = -100;
+$this.gravity = 5;
+$this.launchNinja = function() {
+    let startX = 100;
+    ninja.x(startX);
+    let startY = 400;
+    ninja.y(startY);
+    ninja.speedY($this.startSpeed);
+};
+
+if ($this.scene.state() === "PLAY") {
+    $this.launchNinja();
+}
+```
+
+> `scene`, Update Every Frame
+
+```js
+const spinSpeed = 50;
+ninja.spin(spinSpeed);
+```
+
+> `ninja`, Update Every Frame
+
+```js
+$this.moveX($this.speedX());
+$this.speedY(ninja.speedY() + $this.scene.gravity);
+$this.moveY($this.speedY());
+
+if ($this.x() >= 850) {
+    ninja.x(-10);
+}
+
+if ($this.y() >= 650) {
+    $this.scene.stopCode();
+}
+```
+
+> `trampoline`, Update Every Frame
+
+```js
+$this.x(getPointerPos().x);
+if ($this.isTouching(ninja)) {
+    ninja.speedY($this.scene.startSpeed);
+}
+```