js flip array

 arr = ['red', 'green', "blue", "pink", "purple"];
        var arr1 = [];
        for (var i = 1; i <= arr.length; i++) {
            console.log(arr1.length)
            arr1[arr1.length] = arr[arr.length - i];
            console.log(arr1.length)
        }
        console.log(arr1);