a normal repeater takes up 500 memory, I will show you how to make one that only takes up 90 memory.
First you want to place a lifecycle block.
Next you want to place two wire repeaters.
Now you want to connect the lifecycle to one of the wire repeaters and select event occurs.
Finally you must connect each wire repeater.
Now you have made a repeater taking 410 less memory than the normal repeater block.
(you must connect a device like a counter to one of the wire repeaters for it to work repeat)