$('#s1').cycle({
    fx:     'zoom',
    easing: 'easeInBounce',
    delay:  -4000
});

$('#s2').cycle({
    fx:     'zoom',
    easing: 'easeInBounce',
    delay:  -4000
});

$('#s3').cycle({
    fx:     'zoom',
    easing: 'easeInBounce',
    delay:  -4000
});

$('#s4').cycle({
    fx:     'zoom',
    easing: 'easeInBounce',
    delay:  -4000
});