How to start animation when GUI button is pressed

I have created simple animation in .fbx in blender and import it into the unity. The animation name is simple_anim and the animation will work fine when i play the button. But now i have added two GUI button and i want when i press gui button then the animation will run…I am new to script and i have written this simple script but its not working fine.

function onGUI()
{
    if(GUI.Button(Rect(10,10,150,100),"Button"))
    {
        animation.play("simple_anim");
    }
}

Of that is an accurate paste of the code, the first thing I’ve noticed is the function name is spelled wrong. It should be

function OnGUI()  // With a capital O in On

The second is the “P” on “Play” should be UpperCase:

animation.Play("MyAnimation");