Arduino Christmas Ornament

Designed using Fusion 360.

Print the top & bottom in your choice of color. Print the mid-section and lever in clear.

Other things that you will need.

Arduino Nano
LED 3mm - 12pcs
Screws, M3x8mm, Button Head or Socket Head - 4
Micro Switch - 1
Battery, 9v
Battery Connector
Silicone Wire, Various

LED ground wires are soldered together in a circle
LED + wires are fastened to PWM outputs, Opposite LEDs wired together as a pair

I do not use resistors in this build. Instead, I use PWM to lower the current.

Code to get you started:
int On = 50; //Ms Time that the LED is on
int cycle = 3; //# of times that the LED will flash

void setup() {
Serial.begin(9600);
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
}

void loop() {
if (cycle == 1) {
analogWrite(3, 100); //Orange
delay(On);
analogWrite(3, 0);
}
if (cycle == 2) {
analogWrite(5, 130); //Red
delay(On);
analogWrite(5, 0);
}
if (cycle == 3) {
analogWrite(6, 220); //Purple
delay(On);
analogWrite(6, 0);
}
if (cycle == 4) {
analogWrite(9, 100); //Blue
delay(On);
analogWrite(9, 0);
}
if (cycle == 5) {
analogWrite(10, 90); //Green
delay(On);
analogWrite(10, 0);
}
if (cycle == 6) {
analogWrite(11, 110); //Yellow
delay(On);
analogWrite(11, 0);
}
cycle = cycle + 1;
if (cycle > 6) {
cycle = 1;
}
}