Spookyblue entered the Show us your Halloween Project Contest with this great use of some flashing LEDs. That effect is sure to enhance any zombie or skeleton sitting in your Halloween cemetery!
Via: Hacked Gadgets Forum
"Place a spookyfire "blob" inside a pumpkin, a skull, or anything that would look cool if it were lit with a guttering candle. This effect works great as an indirect light source, but is lessened if you can actually see the blob. The reflected, totally random flicker makes an extremely convincing firelight effect, is very portable, and totally safe."