$Rb[$i-1] = $frame2 -> Radiobutton(-text => $i,-value => $i,-variable => \$Tank_Num,
                                         -width => 80, -anchor => 'w',-background => $mainframes_background,
                                         -font => [$style , $size, $visibility]);
                               
<code>$Rb[$i-1] -> grid($Rb[$i-1],-sticky => 'w',-padx => 10,-pady => 3);
        
    }