.container_flex {
    display: flex;
    flex-direction: row;
}
.column {
  flex: 0 1 auto;
  margin: 5px;
  padding: 10px;
  border: 1px solid #111;
  background-color: #eee;
}

button {
    cursor:pointer;
}
#log {
    width: 500px;
    height: 260px;
}