Not sure where the OP downloaded his P5a from, but the download I offered (TS2009) used
red_marker <kuid:-3:10112>
white_marker <kuid:-3:10111>
green_marker <kuid:-3:10110>
which will have been updated in the OP's system with whatever the current version is... not sure what the effect on the script will be, since it seeks the assigned names ("red_marker" etc.) to display.