.container {
    display: flex;
}

.grid {
    width: 200px;
    height: 400px;
    display: flex;
    flex-wrap: wrap;
    /*background-color: rgb(255, 255, 255);*/
}

.grid div {
    height: 20px;
    width: 20px;
    /*background-color: red;*/
}

.mini-grid {
    margin-left: 50px;
    width: 80px;
    height: 80px;
    display: flex;
    flex-wrap: wrap;
    /*background-color: gray;*/
}

.mini-grid div {
    height: 20px;
    width: 20px;
    /*background-color: red;*/
}

/*.tetromino {
    background-color: blue;
}*/