How to make a flying zombie that swoops down on solo player?

I'm tryna make an fps game where there are multiple types of zombies and one of the zombies can fly. I've tried using body position and body velocity but I'm not an expert on them and they don't seem to work. Can someone help me?

local debounce = true
game.Players.PlayerAdded:Connect(function(player)
	script.Parent.Humanoid.Died:Connect(function()
		if script.Parent.Humanoid.Health <= 0 then
			if debounce == true then
				debounce = false
				player:FindFirstChild("EXP").Value = player:FindFirstChild("EXP").Value + 1
				player:FindFirstChild("Zombies Killed").Value = player:FindFirstChild("Zombies Killed").Value + 1
				wait(0.5)
				debounce = true
			end	
		end
	end)
end)