How do I make a sheep bounce infinitely?

[SpyC0der77]

I want to make a sheep into a perpetual motion machine

[aksiome]

You should take a look at the documentation for the move module. The example provided there can be applied directly to any mob. You just need to set the initial vector scores and then run the apply_vel function as described here: https://docs.mcbookshelf.dev/en/latest/modules/move.html

[SpyC0der77]

I tried that and it didn't work. I think I am doing it wrong. Can you give me an example?

[aksiome]

Let's break it down then.
First, you need to set everything up:

# spawn a sheep with NoAI to prevent natural movement, and with a tag so we can reference it easily
summon minecraft:sheep ~ ~ ~ {NoAI:1,Tags:["bouncing_sheep"]}

# set the initial velocity (you can tweak these values to get the motion you want)
scoreboard players set @n[type=sheep,tag=bouncing_sheep] bs.vel.x 100
scoreboard players set @n[type=sheep,tag=bouncing_sheep] bs.vel.y -70
scoreboard players set @n[type=sheep,tag=bouncing_sheep] bs.vel.z 80

Once everything is set up, you need to run the apply_vel function every tick (in a ticking function or a schedule loop) so the sheep keeps moving:

# continuously apply the velocity (this uses the default bounce behavior)
execute as @e[type=minecraft:sheep,tag=bouncing_sheep] run function #bs.move:apply_vel {scale:0.001,with:{}}

This will use the default bounce behavior, which is exactly what you're after. If you need to tweak how the function behaves, there are a lot of parameters you can set inside the with compound, they're all explained in the documentation.