Colors = id:canvas value:rgb(0.937,0.937,0.937) id:linemark value:gray(0.8) id:linemark2 value:gray(0.9) BackgroundColors = canvas:canvas PlotData = mark:(line,linemark) from:start till:38 color:yellow shift:(20,-5) text:Ronnie Peterson (Laps 1-38) from:38 till:end color:black shift:(20,-5) text:Peter Revson (Laps 39-67)