function Range(start, end, step) {
  this.start = start || 0;
  this.end = end || 60;
  this.step = step || 1;
}
function Range(start, end, step) {
  this.start = start || 0;
  this.end = end || 60;
  this.step = step || 1;
}
function Range ( start , end , step ) { this . start = start || 0 ; this . end = end || 60 ; this . step = step || 1 ; }
/* Range object
/ * Range object