there are 3 differant types of loops in scratch
1 If then loop: a loop that starts and ends depending on a certain condition bieng met.
2 forever loop: a loop that never ends.
3 repeat loop: a loop htat repeats a specified number of times.
no end in sight: use a forever loop because it will never end and does not need to be specified.
because it cannot wait .2 seconds in a loop that repeats forever.
there are differant ways to tell a sprite waht to do usually dictated by an event or button press.
conditionals: no the one on the right is diferant because it has an if not command.