diff --git a/profiling.cc b/profiling.cc
index 64103c4..5089041 100644
--- a/profiling.cc
+++ b/profiling.cc
@@ -176,15 +176,25 @@ void T_Profiler::makeUI( )
 
 	// Plot
 	static constexpr float plHeight = 5;
-	float lh( 0 );
+	uint32_t dLine[ n ];
+	uint32_t cLine = 0;
 	angle = 0;
 	for ( auto i = 0u ; i < n ; i ++ ) {
 		angle = fmod( angle + 137 , 360 );
+		if ( i != 0 ) {
+			if ( chain_[ i ] == Invalid ) {
+				cLine ++;
+			} else {
+				cLine = dLine[ chain_[ i ] ];
+			}
+		}
+		dLine[ i ] = cLine;
 		if ( !displayed_[ i ] ) {
 			continue;
 		}
 		const float lx0 = msWidth * secStarts_[ i ];
 		const float lx1 = msWidth * ( secStarts_[ i ] + secDurations_[ i ] );
+		const float lh = cLine * ( plHeight + 1 );
 		const float ly1 = lh + plHeight;
 		ImVec4 color( 0 , 0 , 0 , 1 );
 		ImGui::ColorConvertHSVtoRGB( angle / 360. , .5 , 1 ,
@@ -192,7 +202,6 @@ void T_Profiler::makeUI( )
 		dl->AddRectFilled( ImVec2( start.x + lx0 , start.y + lh ) ,
 				ImVec2( start.x + lx1 , start.y + ly1 ) ,
 				ImGui::GetColorU32( color ) );
-		lh = ly1 + 1;
 	}
 
 	ImGui::End( );