GM Tutorial 3: Make a sprite glow.
How to make a simple glow around a sprite in GameMaker.
This tutorial was made in GM 8.1, using GIMP 2.6, recorded
using Camtasia Studio Trial.
Get GM: http://www.yoyogames.com/
GIMP: http://www.gimp.org/
(This tutorial requires the full version of GameMaker.)