This enemy is a trap that does not retract. When horizontally or vertically aligned with Link, it moves straight toward him as far as it can. When it can go no farther, it simply stops and waits in place for Link to come into range again.

Set up four consecutive combos:
1: Inactive
2: Starting up
3: Spinning - slow
4: Spinning - fast

Set up an enemy as follows:
Type: Other
Step speed is used
Attribute 1: Move over water
- 0: No
- 1: Yes
Attribute 2: Move over pits (direct warps)
- 0: No
- 1: Yes
Attribute 3: Tile width
- Minimum: 1
- Maximum: 4
- Default: 1
Attribute 4: Tile Height
- Minimum: 1
- Maximum: 4
- Default: 1
Attribute 5: Sound played when first starting to move
Attribute 6: Sound played when stopping
Attribute 7: Sound played while moving
Attribute 8: Time in frames for moving sound to loop
Attribute 11: Inactive combo
Attribute 12: Script slot

Requires ghost.zh, std.zh, and string.zh.
Tiles are here.
Sounds can be found here. In OoA and OoS, Oracle_Block_Push is used when the trap starts moving.