Sleep cycle stages with types of waves

(at night)BATS Drink Blood.

Awake(eye open) - Beta (B)
Awake(eye closed) -Alpha (A)
Light sleep -Theta (T)
Deeper sleep -Slppe spindles (S)
Deepest sleep(nREM) -Delta (D)
Dreaming,Loss of motor tone,erection -Beta (B)