-288 1x2 bricks
Two color: 144 of each color
Three color: 96 of each color
We'll be working from the bottom up. Start with the brick you want in the bottom row (white in the picture) and attach two bricks to it as shown.
Use 3 more white bricks and 2 more blue bricks and make em look like the third picture.
The goal here is to basically make a square zig-zag chain with 5 studs (those are the dots on top of the bricks) on each side.
Keep adding bricks until your model has a few turns in it then meet me over at the next step.
Continue the square zig-zag pattern until you only have 2 bricks left (a top row color and a bottom row color). If you're counting then you'll be aiming for 12 cog sticker-outer things (teeth?).
Note: You want the end of the square zig-zag chain to have a middle brick sticking out, as shown in the picture. This is important for the Close Er Up! Step coming up next.
Step 4: Close Er Up!
Want more 1x2 LEGO fun? Check out these other 1x2 bendy shape Instructables:
Lego Saw Blade
Lego Deltoid and Astroid
Lego Medical Sign