This is how you infinite loop in tk, see Tk::after Just add to fishmonger version :) 
my $colorChanger = sub {
    $red  = floor(5*rand());
    $green = floor(5*rand()+10);
    $blue = floor(5*rand()+20);
};
$colorChanger->(); ## Initizalizezazazabanana
$mw->repeat( 2000, $colorChanger );
MainLoop;

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This way you also don't need an ->update with textvariables

In reply to Re: PERL Tk label(-textvariable)) (Tk::after repeat while(1)) by Anonymous Monk
in thread PERL Tk label(-textvariable)) by State_Space

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