How to change the idle animation?

Trying to change the idle animation. I've tried 2 things..

Game.Players.PlayerAdded:connect(function(player)
    while not player.Character do wait() end
    local character = player.Character
    local animateScript = character.Animate
    animateScript.idle.Animation1.AnimationId = 'http://www.roblox.com/asset/?id=250720232'
end)

And

game.Players.PlayerAdded:connect(function(player)
        player.CharacterAdded:connect(function(character)
player.Character.Animate.idle.IdleAnim.AnimationId = "http://www.roblox.com/asset/?id=250721067"
end)
end)

They both did not work.Anybody got a suggestion for me? D: