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

body{
    background: lightskyblue;
}

h1, p, ul{
   display: flex;
   justify-content: center;
   align-items: center;
   flex-direction: row;
   margin: 50px;
}

li{
    margin-top: 50px;
    list-style: none;
    text-align: center;
    width: 100px;
    height: 100px;
    border: 1px solid black;
    border-radius: 10px;
    background-color: aqua;
}