Step 1: Get the Supplies
1. A semi transparent cup
2. Any Color LED's
3. Batteries and a battery case
4. soldering equipment and know how.
Step 2: Assemble the LEDs
make a circle with it that will fit in the bottom of the cup and press against the outside.
make another circle that is about a quarter to half inch smaller.
wire and solder in the LEDs between them all in the same polarity.
wire and solder the batteries up to the Circle wires on the inside.