Step 1: Check the parts included with the kit.
Step 2: Install the battery holder with the opening to the left.
Step 3: Check battery holder orientation.
Step 4: Install LEDs D1, D2 and D3 with the longer lead to the positive (+) side.
Step 5: Fold the leads of the parts over as you install them to hold them in place.
Step 6: Install the resistors R1, R2 and R3.
Step 7: Install the switch S1.
Step 8: Flip over the PCB and solder the parts.
Step 9: Install a 2032 battery with the positive side up.
Step 10: Turn on the switch and watch the LEDs flash.