How would I make each "Unit" move at the same time?

(There is a lot of stuff behind this)

function down2()
    for _, unit in pairs(selection) do
        local path = game:GetService("PathfindingService"):ComputeRawPathAsync(unit.Torso.Position, mouse.Hit.p, 250)
        local points = path:GetPointCoordinates()



        local followingPath = false

        if not followingPath then
            followingPath = true

            -- Ask the server to calculate a path for us


            for _, point in pairs(points) do
                unit.Humanoid:MoveTo(point)

                -- Don't try moving to the next point until we are close enough to the current point in the path
            repeat
                unit.Humanoid:MoveTo(point)
                distance = (point - unit.Torso.Position).magnitude
                wait()
            until distance < 3
        end
    end
        followingPath = false
    end
end

mouse.Button2Down:connect(down2)

It moves all units but not at the same time, when the first one that walks reaches the point the next ones come. I need it so all units would walk all at once to the point where you right click.