Trying to add recorded key strokes for 'paste text:..'

How would you make this work in terminal? (Ctrl-K), then (Ctrl-A), then y (keystrokes) as I am a network person who uses terminal alot and would like a key to stop 'screen' from running in terminal. I can't seem to use combo+key when I want there to be 3 different key presses one after the other. I suppose I could applescript it? Anyone have advice doing this?