Loop listener

local mydata = require("mydata")

mydata.humanoids = {}
local scrollSpeedX = 0


function createHumanoid(layer)

    local layer = layer or display.currentStage

    for i = 1, 10 do

        local humanoid = display.newRect(0, 0, 10, 10)
        humanoid.x = math.random(-1000, 1000)
        humanoid.y = 260
        physics.addBody(humanoid, { isSensor = true })
        mydata.humanoids[#mydata.humanoids + 1] = humanoid
    end

    function updateHumanoid()

        if switchTerrain == 0 then

            if player.x <= 100 then scrollSpeedX = 0
            else scrollSpeedX = -player.x / 70
            end

        elseif switchTerrain == 1 then

            if player.x <= 100 then scrollSpeedX = 0

            else scrollSpeedX = player.x / 70
            end
    end
    for _, humanoid in ipairs(mydata.humanoids) do
            if humanoid.x then
                humanoid.x = humanoid.x + scrollSpeedX
            end
    end
    end

    Runtime:addEventListener("enterFrame", updateHumanoid)
end