body,
html {
  width: 100%;
  height: 100%;
}

body {
  background: #1d1d1d;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  flex-direction: column;
  color: white;
  font-family: sans-serif;
}

h2 {
  font-weight: normal;
}
#demo {
  position: relative;
  width: 500px;
  height: 350px;
  border-bottom: 100px solid black;
  background: dodgerblue;
}

.truck {
  position: absolute;
  bottom: -3px;
  left: 60px;
}