How do you make a part slide and slide back after some time?

local sp=script.Parent

function onTouched(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		for i=1,10 do
			wait(.1)
			sp.CFrame=CFrame.new(-60.6-i, 0.6, 124)
		end
		wait(2.5)
		for i=1,10 do
			wait(.1)
			sp.CFrame=CFrame.new(-70.6+i, 0.6, 124)
		end
	end
end

sp.Touched:connect(onTouched)

Now for an explanation.

	if hit.Parent:FindFirstChild("Humanoid") then

We make sure it was a player that touched it.

		for i=1,10 do

This for loop repeats itself ten times before moving on.

			wait(.1)

We wait .1 seconds before running the rest of the loop.

			sp.CFrame=CFrame.new(-60.6-i, 0.6, 124)

Now, since i=1 we can use i to move the block -10 studs over. You need to change the Position though since my brick is not in the same position as your brick.

		wait(2.5)

Now we wait 2.5 seconds to run the next for loop.

			sp.CFrame=CFrame.new(-70.6+i, 0.6, 124)

Now make sure you corrected the blocks position since it moved, and this time we add 1 ten times. Moving the brick a +10 studs over, bringing it back to it's original position.