t2.si

// create a unit producing a 'rotating' bit pattern
unit rotate(output uint8 o)
{
  uint8 bits(8b1);
  always {
    o    = bits;
    bits = {bits[0,1],bits[1,7]};
  }
}
// main unit
unit main(output uint8 leds)
{
  rotate r; // instantiate the unit
  always {
    leds = r.o;  // assign the output to leds
    __display("leds:%b",leds); // print leds
  }
}