$graph = new Graph( 300 , 380 ,'auto');
...........
$gbplot = new GroupBarPlot($abplot);
$gbplot->SetWidth( 0 . 9 );
$graph->Add($gbplot);
$graph->Stroke();

$g = new CanvasGraph( 200 , 100 ,'auto');
$g->SetMargin( 5 , 11 , 6 , 11 );
$g->SetMarginColor("teal");
$g->InitFrame();
$scale = new CanvasScale($g);
$scale->Set( 0 , 20 , 0 , 20 );
$shape = new Shape($g,$scale);
$shape->SetColor('black');
$shape->SetColor('green');
//$shape->SetPattern(PATTERN_DIAG4,"darkgray");
$shape->FilledRectangle( 15 , 8 , 19 , 14 );
$g->Stroke();