diff --git a/diagram_gap.tex b/diagram_gap.tex
index d8efc1b1524cfdc2cc9f12dd74501cc814537eb0..a5ecd70cd6c34ae91301a8c628cb58fa980f5db3 100644
--- a/diagram_gap.tex
+++ b/diagram_gap.tex
@@ -28,6 +28,9 @@
     \foreach \x in {1,2,4,7,9} {
         \draw[fill,red] (\x,0) circle (0.08);
     }
+    \foreach \x in {3,5,6,8} {
+        \draw[fill,blue] (\x-0.06,0-0.06) rectangle +(0.12,0.12);
+    }
 
     \draw[<->] (1,-0.5) -- (9,-0.5);
     \draw (5,-0.9) node {$\mathcal{D}(C)$};
@@ -37,8 +40,10 @@
 
     \draw[fill,red] (1,-2) circle (0.08);
     \draw (2,-2) node {slots $C$};
-    \draw[fill] (5,-2) circle (0.04);
-    \draw (6.5,-2) node {non-slots $[n]\setminus C$};
+    %\draw[fill] (3,-2) circle (0.04);
+    %\draw (4.5,-2) node {non-slots $[n]\setminus C$};
+    \draw[fill,blue] (7.4-0.06,-2-0.06) rectangle +(0.12,0.12);
+    \draw (8,-2) node {$C_{><}$};
 \end{tikzpicture}
 
 \end{document}
