addWall.dart

var Field, Visited;
void main() {
  Field = [
    [1, 1, 0, 0, 0],
    [1, 0, 1, 1, 0],
    [1, 1, 1, 0, 1],
    [0, 0, 0, 1, 0],
    [0, 0, 0, 0, 0],
  ];
  Visited = [
    [true, true, true, true, true, true, true],
    [true, false, false, false, false, false, true],
    [true, false, false, false, false, false, true],
    [true, false, false, false, false, false, true],
    [true, false, false, false, false, false, true],
    [true, false, false, false, false, false, true],
    [true, true, true, true, true, true, true]
  ];
  addWall(Field, 5);
}

void addWall(var list, int fillObject) {
  var length = list.length;
  var allWall = new List.filled(length+2, 5);
  print("$allWall");
  //list.insert(0,allWall);
  list.add(allWall);
  for (int i = 0; i < length; i++) {
    list[i].insert(0,5);
  }
  print("$Field");
}