Well, mainly, I was watching one of Ceave Gamings videos, and I noticed that he had a really good idea for Skewer based timers, so today, I'll be showing you all how to make a skewer timer. For this example, we're going to make it trigger a P switch, but you could make it trigger anything really.

For this example, well be using an area, that is 6 blocks high and 8 blocks wide.

So on the 6th row, 8th column, place a P switch.
On the 1st row, 8th column, place a mucher.
On the second, third, fourth & fifth row, and the sixth, seventh and eighth column, place stone block. It should be above the P-Switch and below the muncher.
On the second, third, fourth & fifth row, and the first, second, third and fourth column, place the skewer.