All your code should be in a loop as you create new details and new coordinates all the time.
while true do
wait(1) – You can put the number you want
local AcidRain = Instance.new (“Part”, game.Workspace)
local RandomAcid = math.random (1,413)
local RandomAcid2 = math.random (1,413)
AcidRain.Size = Vector3.new(0,45, 1, 0,65)
AcidRain.Material = “Neon”
AcidRain.Anchored = false
AcidRain.Position = Vector3.new(RandomAcid, 212.55, RandomAcid2)
end
Change the range of random numbers. If you want the rain to spawn all over the map, put the range of x and y: from -254 to 254 (with a default baseplate). If you need some other area, just go into the studio and look for the coordinates of this area, insert the lower coordinate and the larger one into the range.