var stage = 0
$(document).ready(function () {
        var height1 = $("#eins").height ();
        var height2 = $("#zwei").height ();
        console.log (height1, height2);
        $(window).scroll(function () {
            var pos = $(this).scrollTop ();
            if (stage ==1 && pos-200 >= height2) { console.log ( moveBlobs (2050, 600, 2))}
            else if (stage == 2 && pos < height2 ) { moveBlobs (1000, 1000, 1)}
            else if (stage == 0 && pos+600 >= height1){ moveBlobs (1000, 1000, 1)}
            else if (stage == 1 && pos < height1-450){ moveBlobs (0,0,0) }
        })
}
)

function moveBlobs (t, r, to) {
    var dur = 0.4
    if (stage < to) {
        $("#blobs").css ({
            'animation': 'move-down-' + to +' ease-out '+dur+ 's'
        })
        $("#green").css ({
            'animation': 'green-move-down-'+ to + ' ease-in '+dur+ 's'
        })
        $("#red").css ({
            'animation': 'red-move-down-'+ to + ' ease-in '+dur+ 's'
        })
        $("#blue").css ({
            'animation': 'blue-move-down-'+ to + ' ease-in '+dur+ 's'
        })
    }
    else {
        $("#blobs").css ({
            'animation': 'move-down-' +(to+1)+ ' ease-out '+dur+'s reverse'
        })
        $("#green").css ({
            'animation': 'green-move-down-'+ (to+1) + ' ease-in '+dur+ 's reverse'
        })
        $("#red").css ({
            'animation': 'red-move-down-'+ (to+1) + ' ease-in '+dur+ 's reverse'
        })
        $("#blue").css ({
            'animation': 'blue-move-down-'+ (to+1) + ' ease-in '+dur+ 's reverse'
        })
    }
    setTimeout (function () {
        $("#blobs").css ({
            'top': t + 'px',
            'right': r + 'px',
            'animation': '',});
        $("#green").css ({ 'animation': '' })
        $("#blue").css ({ 'animation': '' })
        $("#red").css ({ 'animation': '' })
        stage = to;
    }, (dur*1000)-1)
}