diff --git a/slides/sections/5.md b/slides/sections/5.md
index cd20c8a..e12f369 100644
--- a/slides/sections/5.md
+++ b/slides/sections/5.md
@@ -27,23 +27,20 @@ Quantify distance between expected and observed CDF. KS statistic:
   \begin{center}
   \begin{tikzpicture}[>=Stealth]
     % empiric
-    \draw [cyclamen, fill=cyclamen!20!white] (-2.5,0) rectangle (-1.5,0.5);
-    \draw [cyclamen, fill=cyclamen!20!white] (-1.5,0) rectangle (-0.9,1);
-    \draw [cyclamen, fill=cyclamen!20!white] (-0.9,0) rectangle (-0.6,1.5);
-    \draw [cyclamen, fill=cyclamen!20!white] (-0.6,0) rectangle ( 0.5,2);
-    \draw [cyclamen, fill=cyclamen!20!white] ( 0.5,0) rectangle ( 0.7,2.5);
-    \draw [cyclamen, fill=cyclamen!20!white] ( 0.7,0) rectangle ( 1.2,3);
-    \draw [cyclamen, fill=cyclamen!20!white] ( 1.2,0) rectangle ( 1.6,3.5);
-    \draw [cyclamen, fill=cyclamen!20!white] ( 1.6,0) rectangle ( 2.3,4);
-    \draw [cyclamen, fill=cyclamen!20!white] ( 2.3,0) rectangle ( 2.5,4.5);
+    \draw [cyclamen, thick, fill=cyclamen!20!white]
+          (-2.5,0)   -- (-2.5,0.5) -- (-1.5,0.5) -- (-1.5,1)  -- (-0.9,1)  --
+          (-0.9,1.5) -- (-0.1,1.5) -- (-0.1,2)   -- (1,2)     -- (1,2.5)   --
+          (1.2,2.5)  -- (1.2,3)    -- (1.3,3)    -- (1.3,3.5) -- (1.6,3.5) --
+          (1.6,4)    -- (2.3,4)    -- (2.3,4.5)  -- (2.5,4.5) -- (2.5,0)   --
+          cycle;
     % points
     \draw [yellow!50!black, fill=yellow] (-2.6,-0.1) rectangle (-2.4,0.1); %-2.5
     \draw [yellow!50!black, fill=yellow] (-1.6,-0.1) rectangle (-1.4,0.1); %-1.5
     \draw [yellow!50!black, fill=yellow] (-1,-0.1)   rectangle (-0.8,0.1); %-0.9
-    \draw [yellow!50!black, fill=yellow] (-0.7,-0.1) rectangle (-0.5,0.1); %-0.6
-    \draw [yellow!50!black, fill=yellow] (0.4,-0.1)  rectangle (0.6,0.1);  % 0.5
-    \draw [yellow!50!black, fill=yellow] (0.6,-0.1)  rectangle (0.8,0.1);  % 0.7
+    \draw [yellow!50!black, fill=yellow] (-0.2,-0.1) rectangle (0,0.1);    %-0.1
+    \draw [yellow!50!black, fill=yellow] (0.9,-0.1)  rectangle (1.1,0.1);  % 1
     \draw [yellow!50!black, fill=yellow] (1.1,-0.1)  rectangle (1.3,0.1);  % 1.2
+    \draw [yellow!50!black, fill=yellow] (1.2,-0.1)  rectangle (1.4,0.1);  % 1.3
     \draw [yellow!50!black, fill=yellow] (1.5,-0.1)  rectangle (1.7,0.1);  % 1.6
     \draw [yellow!50!black, fill=yellow] (2.2,-0.1)  rectangle (2.4,0.1);  % 2.3
     % expected
@@ -51,7 +48,7 @@ Quantify distance between expected and observed CDF. KS statistic:
     \draw[domain=-2.5:2.5, yscale=5, smooth, variable=\x, yellow, very thick]
           plot ({\x}, {((atan(\x)*pi/180) + pi/2)/pi});
     \pause
-    \draw [very thick, cyclamen, <->] (0.5,2.5) -- (0.5,3.25);
+    \draw [very thick, cyclamen, <->] (1,2.5) -- (1,3.75);
   \end{tikzpicture}
   \end{center}
   \setbeamercovered{transparent}