Run through floating gardens. Jump, fire and take on rivals. In Skybound Arcade, the action leads you to your next Python challenge.

In Trailblazers: Skybound Arcade, read your checkpoint goal, then watch its lesson before answering.

Watch how a loop picks alternate items from a sequence. The lesson gives you an example before you try the separate practice question.

The practice asks for alternate letters, starting with the second. Run your code and compare the checks. Our first letter is wrong.

Ask your tutor for a hint. Your current code and its checked output stay together in the workspace.

In items[::2], leaving out the start makes the slice begin at index 0, which is w. The i is at index 1.

The number before the first colon sets where a slice starts.

Put i’s index before the first colon, then run your code again.

Change where the slice starts, then run Python again. The letters now match the expected output. The practice is complete.

Now return to the original checkpoint. This question asks for alternate list items starting with the first. Write your answer and check it.

All checks pass. The garden wind sail rises, and your carrier takes you across to the next checkpoint.

Explore further and meet your next challenge. Each checkpoint gives your learning a purpose.

Start with your experience and the world you want to explore. Discover woodland adventures, space missions, and island or arcade challenges.

Watch each course's short trailer, see what you will learn, and choose the game you want to buy. Explore the AlgoPath games and find your next adventure.