Again, this is with kindergarten, first and second grades. We discuss loops in our own lives. Get up, get dressed, eat breakfast, go to school, come home, play, put on pj's, go to bed. (Later, you can add on conditionals to this script: if weekday, then this loop, else watch cartoons, go to soccer, etc.). We discuss smaller loops: eating something (bring to mouth, bite, chew swallow, repeat until...), walking (right foot forward, left foot forward).
Then I put several "scripts" with loops on the board or floor and they follow them. For example: jump, clap, bend, jump, clap, bend, jump, clap, bend. Then written this way: 3(jump, clap, bend) We discuss which is easy to read and execute. Then they write loops of their own on cards and act them out.