* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

#canvas1 {
  width: 90%;
  margin-top: 10px;
  background-color: blueviolet;
}