style.css

.container div{
    background-color: rgb(255, 127, 242);
    display: flex;
    align-items: center;
    justify-content: center;
    position:relative;
}
body{
    font-size: 1.5rem;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
.container{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 150px);
    /* grid-auto-rows: 150px; */
    /* column-gap: 20px;
    row-gap: 20px; */
    gap: 20px;
    

    counter-reset: my;
}
.container div::after{
    counter-increment: my;
    content: ": " counter(my);
}
.container div:nth-child(2)
{
    background-color: darkcyan;
    grid-column: span 3;
}
.container div:nth-child(3)
{
    background-color: skyblue;
    grid-row-start: 3;
    grid-row-end: -1;
}
.container div:nth-child(4){
    background-color: yellow;
    color: black;
    grid-row: span 2;
}
.container div:nth-child(7){
    background-color:skyblue;
    color: black;
    grid-column: 3 / -1; /* same 3 / 5 */
}
.container div::before {
    content: "";
    width: 10px;
    height: 10px;
    margin: 0.5rem;
    border-radius: 50%;
    background-color: lightgreen;
    position: absolute;
    top: 0;
    left: 0;
}

.container div:nth-child(odd)::before{
background-color: firebrick;
}