Lesson 36 of 79 · 15 minutes

Loops inside loops: Pixel Tiles

Lay rows of tiles to match a picture. A loop inside a loop can draw a whole grid.

What you'll learn

• Staying on the same line
• A loop inside a loop
• Using both loop variables
• An inner loop that changes
• Rows and columns swapped

Each idea opens with a short narrated video, about 2 minutes in all. Then you put it to work in the game.

The six levels

1. A Longer Row Change it
2. A Full Wall Copy and type
3. Chessboard Fill the gap
4. Staircase Write it
5. On Its Side Fix it
6. Any Board Boss level

The levels go from changing one word, to writing the code on your own. The boss level changes every time you play.

New to Python? Start with the free games in Module 1.