body {
            background: #eee;
         }
         
         #imgGrid {
            width: 800px;
            overflow: auto;
            margin: 10px auto;
         }
         #imgGrid img {
            display: block;
            width: 75px;
            height: 75px;
            float: left;
            margin: 5px;
            cursor: pointer;
         }
         .toolBar {
           text-align: center;       
         }
         button {
           background-color: #008CBA; /* Blue */
           border: none;
           color: white;
           padding: 7px 14px;
           text-align: center;
           text-decoration: none;
           display: inline-block;
           font-size: 13px;
           margin: 4px 2px;
           border-radius: 12px;
           cursor: pointer;
          }
          .container {
            position: relative;
        }
        .overlay {
           background: #ddd;
           border: none;
           padding: 7px 14px;
           text-align: center;
           display: inline-block;
           font-size: 13px;
           border-radius: 12px;
           margin: auto;
           widows: auto;
        }
        canvas {
         background: #bbb;
         border: 2px solid #000;
         box-shadow: 0 3px 10px #777;
         display: block;
         margin: 10px auto 10px;           
      }

      .overlayold {
         position: absolute; 
         bottom: 0; 
         background: rgb(0, 0, 0);
         background: rgba(0, 0, 0, 0.5); /* Black see-through */
         color: #f1f1f1; 
         width: 100%;
         transition: .5s ease;
         opacity:1;
         color: white;
         font-size: 20px;
         padding: 20px;
         text-align: center;
       }