Oh, and how do you make button-triggered blocks that come back at a different speed to them appearing, ala 7-19X XOXO?
I looked into it. There's a default value for blocks coming back, and you can't change it.
If you were going for a snake effect, this is still kind of possible. If the closing blocks catch up to the opening blocks, (If your blocks take longer to open than your delay) it creates a 1 block wide gap.
Regarding the spinning saw timing: The little saw takes about 1.555555 seconds and the large takes 5 seconds To get your ideal speed, divide the default speed by the speed you would like.