How to Do it:

Place A Redstone Torch and At Its Left, Put Redstone Dust

Then 2 Blocks Forward From The Redstone Torch, Place Redstone Dust

Then, Place A Redstone Repeater The Same Way In The Attachment

Then Place A Redstone Repeater 1 Block Forward Which Should Make A Activated Repeater.

Then Place A Repeater Making The Repeater Lock