Presenting text in block definitions

Dear All,
we want to present some text while sounds are demonstrated in a practice block. However, the text is not removed from the screen, it just overwrites itself becoming unreadable.

Example:

block practice_a2

message i8

#-- sound

text "Low sound" 0 0

sound ll

delay 1500

text "High sound" 0 0

sound hh

delay 1500

#-- sound

text "Low sound" 0 0

sound ll

delay 1500

text "High sound" 0 0

sound hh

delay 1500

#----- End Sounds ----

message i9

set &blocktype -1

tasklist

Aud_ST2 30

end


How can I remove e.g. "Low sound" from the screen again? Maybe just present a black bitmap on top?

Kind Regards,

Andre