diff --git a/planning_scatter.md b/planning_scatter.md
index 59a5b77..80f9fa3 100644
--- a/planning_scatter.md
+++ b/planning_scatter.md
@@ -5,11 +5,19 @@
     - Draw the x-axis.
       - Draw the line.
       - Determine the minimum and maximum values.
+        - Read the list.
+        - Order the list.
+        - Print head 1.
+        - Print tail 1.
       - Draw the ticks.
       - Label the ticks.
     - Draw the y-axis.
       - Draw the line.
       - Determine the minimum and maxiumum values.
+        - Read the list.
+        - Order the list.
+        - Print head 1.
+        - Print tail 1.
       - Draw the ticks.
       - Label the ticks.
   - Plot the points.