how to make the animation of an html element startr on boot code example

Example: css animation

div{
	animation: name duration timing-function delay iteration-count 
  		direction fill-mode;
}

/* 
name: name of the animation
duration: amount of time it takes ex: 2s
timing-function: ex: linear, ease, etc.
delay: amount of time to delay from it starting
iteration-count: how many times to play the animation, ex: initial
direction: ex: forwards, backwards, alternate, alternate-reverse
fill-mode: ex: none, forwards, backwards, both
*/