[amibroker] How to change color between horizontal lines

["mic6399" <mic6399@xxxxxxxxxxxx>]

Hi, may be this is the stupid question  , but if somebody help me to 
change/paint background color between horizontal lines. Let say I have: 
some levels on the chart : 
Plot(12,"THold", colorBlack, styleThick); 

Plot(20,"THold", colorBlack, styleThick); 
How can I paint the area between this two lines on the chart? 

Thanks a lot, 

Michael


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