(let ((tetramine (random-tetramine)) (x 6) (y 0)
(next (random-tetramine))
(timer (make-timer))
(grid (make-list 20 :initial-element (make-list 14)))
(let ((tetramine (random-tetramine)) (x 6) (y 0)
(next (random-tetramine))
(timer (make-timer))
(grid (make-list 20 :initial-element (make-list 14)))