Part 4

1. Left-Click and Hold while dragging your mouse across the sky to create a box that Multi-Selects your paths.
2. Open your Properties Window.
3. Find the Appearance Section.
4. Click the Drop-down Arrow next to Appearance if not already opened.
5. Scroll down and Set Transparency somewhere in between 0-1.
6. Play Test your game!

Tip: if you set Transparency to 1 it will be completely invisible. If you set the transparency to 0.9 it will be a little easier for players to see.