Think quickly about what loop would be best to move our clone. We can choose from: "Repeat __", "Forever" and "Repeat until ___". It might help to think about our movement as going until we hit the right side of the screen.
Grab a "blank > 50" block from Operators and add it to our if statement. Then we change 50 to 230 and add the "x position" variable from the bottom of motion. Then add "move 2.5 steps" to the loop.