html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  position: absolute;
}

.parent {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 1fr 5fr 1fr 5fr;
  grid-column-gap: 0px;
  grid-row-gap: 0px;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

.parent div{
  margin: 0.5em;
  padding: 0;
}

.slidecontainer {
  width: 100%;
  height: 100%;
}

input[type=range][orient=vertical] {
  writing-mode: vertical-lr;
  direction: rtl;
  appearance: slider-vertical;
  width: 16px;
  vertical-align: bottom;
}


.div1 { grid-area: 1 / 1 / 2 / 2; }
.div2 { grid-area: 1 / 2 / 2 / 3; }
.div3 { grid-area: 1 / 3 / 2 / 4; }
.div4 { grid-area: 2 / 1 / 3 / 2; }
.div5 { grid-area: 2 / 2 / 3 / 3; }
.div6 { grid-area: 2 / 3 / 3 / 4; }
.div7 { grid-area: 3 / 1 / 4 / 2; }
.div8 { grid-area: 3 / 2 / 4 / 3; }
.div9 { grid-area: 3 / 3 / 4 / 4; }
.div10 { grid-area: 4 / 1 / 5 / 2; }
.div11 { grid-area: 4 / 2 / 5 / 3; }
.div12 { grid-area: 4 / 3 / 5 / 4; }
.div13 { grid-area: 1 / 4 / 2 / 5; }
.div14 { grid-area: 2 / 4 / 5 / 5; }

canvas {
  display: block;
}