body { margin-left:50px; } #container1 { border: 1px solid red; width:350px; height:150px; display:flex; } #container2 { border: 1px solid red; width:350px; height:150px; } #domino1 { border: 3px solid black; width:80px; height:40px; display:flex; background-color:beige; } .dominoA { border-right: 1px solid black; width:40px; } .dominoB { width:40px; } Button { float:left; height:30px; margin-left:200px; } .point { width:13px; height:13px; float:left; } .point0 { width:3px; height:3px; border: 1px solid black; border-radius:50%; background-color:black; margin-top:3px; margin-left:3px; }