# glowing pendulum blocks challenges Coding challenges for the glowing pendulum tutorial. ## Before we get started Complete the following [glowing pendulum activity](/lessons/glowing-pendulum/activity) and your code should look like this: ```blocks basic.forever(() => { let acceleration = input.acceleration(Dimension.Y); acceleration = Math.abs(acceleration); acceleration = acceleration / 4; led.setBrightness(acceleration) basic.showLeds(` # # # # # # # # # # # # # # # # # # # # # # # # # `) }); ``` ## Challenge 1  Hold the @boardname@ in your hand in a dark room. Move the @boardname@ like a pendulum and produce a slow image that captures the pattern of the @boardname@ LEDs. ## Challenge 2 Replace "y" in `acceleration(y)` with "x" or "z". Changing the axis will cause the @boardname@ to measure the force in a different direction. What differences in the resulting pattern does this replacement make?