.square, .circle {
    width: 100px;
    height: 100px;
    display: inline-block;
}
.circle {
    border-radius: 50%;
}
#blockGreen {
    background-color: rgb(74, 230, 157);
    position: relative;
    }
#blockPink {
    background-color: rgb(247, 84, 174);
    position: relative;
    }
#container {
        background-color: rgb(74, 230, 157); margin: 0 auto;
        width: 400px;
        height: 400px;
        }
#blockT {
            background-image: url('Asset\ 2.png'); margin: auto;
            width: 400px;
            height: 400px;
            }