css-animation
blur-effect: https://codepen.io/sadiaafrinpurba/full/gQJRYE/
buttons-hover: https://codepen.io/sadiaafrinpurba/full/KrLNRP/
float-text-animation: https://codepen.io/sadiaafrinpurba/full/vQqRqw/
heartbeat-animation: https://codepen.io/sadiaafrinpurba/full/WYqzMv/