Drew outline for making scatter plot

I'm not sure how to draw text with the turtle library but besides that
I think I can do the rest.

planning_scatter.md

@@ -1,12 +1,13 @@
 # Planning the scatter plot
 
 - Draw a scatter plot.
+  - Determine the bounds of the data and the scale of our coordinate system.
   - Draw the axes.
-    - Draw the x-axis.
+    - Draw the axes.
       - Draw the line.
-      - ...
-    - Draw the y-axis.
-      - Draw the line.
-      - ...
+      - Draw the ticks in even intervals
+      - Draw the scale.
   - Plot the points.
-    - ...
+    - Set size of point
+    - Set color
+    - Draw point