code: protected function drawPipesBeginning()
  	{
  		foreach ($this->pipes as $pipe)
  		{
  			$this->drawBorderTop();
  
  			$this->drawBordered(
  				$this->geometry->getSpacedPipe($pipe, static::NOCK, 'before()')
  			);
  		}
  	}
docs: Draw the beginning of all pipes.
  
  @author	Andrea Marco Sartori
  @return	void