How would you accelerate a sprite in proportion to moving another one?

So I have a sprite that goes from 0 to 100 in speed and I want it to accelerate proportionately to moving another sprite from 0 to 100 pixel. How would you do it?

Which behavior are you using? With Bullet, for example, you can set Sprite2 Bullet speed to Sprite1.Bullet.Speed

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Or if you want to simply "mirror" all movements of sprite1, you can do this:

On every tick: Sprite2 set position to (Sprite1.x+100, Sprite1.y+100)

Which behavior are you using? With Bullet, for example, you can set Sprite2 Bullet speed to Sprite1.Bullet.Speed

.

Or if you want to simply "mirror" all movements of sprite1, you can do this:

On every tick: Sprite2 set position to (Sprite1.x+100, Sprite1.y+100)