#block li{
  display:block;
}
#h1{
  text-align: center;
}
#h2{
  text-align:center;}

#img{
  height:10px;}
 body{
  background-image: url(https://vignette.wikia.nocookie.net/theadventuresofgarythesnail/images/4/47/SpongeBob%27s_pinapple_house.png/revision/latest?cb=20150309181810);background-size: cover
  }