not a problem.
The only thing you need is a "relator" type sign that you can pick up at most home improvement stores, and then obviously the lights.
The detailed instructions include a letter/number guide for how to put the lights to make each letter/number.
I tweaked the layout to fit the number of lights I had. I used 230 lights total I believe. 100 green, 100, white, and 30 white.
It only took about 20 minutes to go from parts to finished product and testing.
Yes I do have one bulb that burnt out in the middle of the numbers in the pic.