Lesson 5 of 8
Finding the one wrong block
Show on a big screenA sprite stops two squares from the flag. Which block sent it the wrong way?
Step 1 of 4
- A program with five blocks — one is wrong.
- Run it, and watch where it actually goes.
- Block 3, Turn right, is the wrong one.
- Remove it, and add Turn left instead.
The wrong block first sends the sprite the wrong way.
A program does exactly what its blocks say.
A mistake in a program is a bug. Debugging means finding and fixing it. Run the program. Find the step where the sprite first goes wrong. Then look at that block.
Tap the wrong block to fix it.
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Try the lab to finish this lesson.