Step 3: Electronics
The first image is how I did my circuit board.
The power supply is 9 volts.
The blue spots are my resistors, 100 Ohms each*
The red spots are LEDs. The color of my LEDs are blue so the voltage drop was 3.0 - 3.5 Volts per LED. When making your own LED array use the chart underneath to calculate the voltage drop**.
Red 1.8 - 2.1V
Blue 3.0 - 3.5V
White 3.0 - 3.5V
*Use the amount of Ohm's appropriate to your circuit