body {
  font-family: Helvetica;
  margin: 0px;
}

#lewy1 {
  height: 400px;
  width: 70%;
  background-color: Snow;
  text-align: center;
  float: left;
}

#lewy2 {
  height: 400px;
  width: 70%;
  background-color: Snow;
  font-size: 150%;
  float: left;
}

#prawy1 {
  height: 150px;
  background-color: SteelBlue;
  color: white;
  text-align: center;
  width: 30%;
  float: right;
}

#prawy2 {
  height: 350px;
  background-color: SteelBlue;
  color: white;
  width: 30%;
  float: right;
}

#prawy3 {
  height: 300px;
  background-color: Snow;
  width: 30%;
  text-align: center;
  float: right;
}

#stopka {
  background-color: SteelBlue;
  color: white;
  clear: both;
  padding: 20px;
}

h2 {
  font-size: 250%;
}

img {
  padding: 4px;
}

img:hover {
  padding: 3px;
  border: 1px solid SteelBlue;

}