Vertical line - code error

[royalrock]

DefineGlobalColor("Open", Color.LIGHT_GRAY);
DefineGlobalColor("Close", Color.LIGHT_GRAY);

input ShowTodayOnly = yes;

if ShowTodayOnly then
{

AddVerticalLine(secondsTillTime(0930) == 0, "Open", globalColor("Open"), Curve.Short_Dash);

} else {

Double.NaN;
}


I want this vertical line only for for current day..but getting error with this code...any help ...Thanks!
Want to have this line for every time frame from 4hr to 1 min...not for daily

 

[Florida]

DefineGlobalColor("Open", Color.LIGHT_GRAY);
DefineGlobalColor("Close", Color.LIGHT_GRAY);

#input ShowTodayOnly = 1;
def Start930 = SecondsFromTime(0930) > 0; # establish time (any time)
def today = if GetDay() == GetLastDay()  then 1 else 0; # establish day

# word "AND" and "&&" are interchangable here
# Call syntax: AddVerticalLine(visible = today && ( Start930 > 0 && Start930[1] <= 0 ) , text = "0930"  ,color = Color.WHITE ,stroke = curve.FIRM );

AddVerticalLine( today && ( Start930 > 0 && Start930[1] <= 0 ) ,"0930"  ,GlobalColor("Open") ,curve.FIRM );

 

[royalrock]

DefineGlobalColor("Open", Color.LIGHT_GRAY);
DefineGlobalColor("Close", Color.LIGHT_GRAY);

#input ShowTodayOnly = 1;
def Start930 = SecondsFromTime(0930) > 0; # establish time (any time)
def today = if GetDay() == GetLastDay()  then 1 else 0; # establish day

# word "AND" and "&&" are interchangable here
# Call syntax: AddVerticalLine(visible = today && ( Start930 > 0 && Start930[1] <= 0 ) , text = "0930"  ,color = Color.WHITE ,stroke = curve.FIRM );

AddVerticalLine( today && ( Start930 > 0 && Start930[1] <= 0 ) ,"0930"  ,GlobalColor("Open") ,curve.FIRM );

Thank you!!!!!