Change One Thing
What you are about to achieve
Change one visible detail in examples/clearscreen/main.go and rebuild examples/clearscreen/game.z64 so you know the code you edit affects the ROM you run.
Expected result

Minimal change
In examples/clearscreen/main.go, change:
gosprite64.ClearScreenWith(gosprite64.Blue)
To:
gosprite64.ClearScreenWith(gosprite64.Red)
From the repository root, rebuild the ROM:
./build_examples.sh
Then reopen examples/clearscreen/game.z64.
What changed
You changed one rendering line in examples/clearscreen/main.go and rebuilt the ROM.
Why it matters
Beginners gain confidence faster when they can make one tiny edit and immediately see the result.
If this failed
Make sure you saved examples/clearscreen/main.go, ran ./build_examples.sh from the repository root, and reopened examples/clearscreen/game.z64.
Next step
Go to Make Something Move.