This project started when I printed Diagrid Bracelet by nervoussystem and got the idea to add some LEDs to it. I later change the design to be a solid half circle that locks really nice when the LEDs lighten it up. A adafruit trinket (Attiny85) is controlling a Neopixel 144 LED/m strip and reading value from a FLORA Accelerometer/Compass Sensor (LSM303) using I2C.