The official certificate and ribbon awarded to each hardworking student
//this function only works for specific images page-id = 1761
//page-id = 1761 is slug='piano-lessons-checklist'
//The if is not working since it's not inside the changeImage function.
//It did not worked when placed in there - I couldn't figure out the correct syntax. :(
//if ( is_page( 'piano-lessons-checklist' ) )