Why isnt my move script working?

I made this base upon our script, there are a lot of improvements to make but I did not have time to finish it.

You need to store the angle and apply it to the cframe so that it faces the direction you are traveling and you need to add a method to stop if going beneath the floor.

Hope this helps you.

fish = script.Parent
function curX()
	return fish.CFrame.x
end

function curY()
	return fish.CFrame.y
end

function curZ()
	return fish.CFrame.z
end

function ran(low, high) -- hole numbers only i think?
	return math.random(low, high)
end

while true do
	for i=1,ran(1, 100) do
		fish.CFrame = CFrame.new(curX() + 0.2, curY()+ 0.1, curZ()+ ran(10,100)/100)
		wait(0.1)
	end

	for i=1,ran(10,360) do 
		fish.CFrame = CFrame.new(curX(), curY(), curZ()) * CFrame.fromEulerAnglesXYZ(0,i/100,0) 
		wait(0.01) 
	end
	
	for i=1,ran(1, 100) do
		fish.CFrame = CFrame.new(curX() - 0.2, curY() -0.1, curZ() - ran(10,100)/100)
		wait(0.1)
	end

end