# 制作一个指南针

## 体验一下指南针

"""
compass.py
Creates a compass.
The user will need to calibrate the compass first. The compass uses the
built-in clock images to display the position of the needle.

"""
from microbit import *

# Start calibrating
compass.calibrate()
# Try to keep the needle pointed in (roughly) the correct direction
while True:
sleep(100)
needle = ((15 - compass.heading()) // 30) % 12
display.show(Image.ALL_CLOCKS[needle])