Rapid Pulsers

DAY 1: RAPID PULSERS
Here are three rapid pulser designs that are simple to build.

Torch Burnout - Difficulty: Easy

Key from left to right: Layer 1, Layer 2

Comparator Clock - Difficulty: Easy

Note: Comparator needs to be in subtraction mode.
Note: This system is directional, if it doesn't work, try putting the output in different directions.

Redstone Block Breaker - Difficulty: Medium

Note: {x}, {y}, {z} refer to the cords of the middle block
Left command block: /setblock {x} {y} {z} minecraft:redstone_block 0 destroy
Right command block: /setblock {x} {y} {z} minecraft:air
Note: to start, place a redstone block at {x},{y},{z}
Note: to stop, power the left command block