diff --git a/javacooksrc/javacooksrc/main/java/plotter/PlotDriver.java b/javacooksrc/javacooksrc/main/java/plotter/PlotDriver.java
index 773561a..1b3191e 100644
--- a/javacooksrc/javacooksrc/main/java/plotter/PlotDriver.java
+++ b/javacooksrc/javacooksrc/main/java/plotter/PlotDriver.java
@@ -43,6 +43,17 @@ public static void main(String[] argv) {
         r.drawString("Hello World");
         r.penColor(4);
         r.drawBox(10, 10);
+
+        //Draw a triangle with moveTo and rmoveTo
+        //proves that the PlotterAWT moveTo and rmoveTo works fine even when you don't have a drawBox afterward.
+        r.penUp();
+        r.moveTo(r.MAXX - 10, r.MAXY - 10);
+        r.penDown();
+        r.penColor(1);
+        r.rmoveTo(-50, 0);
+        r.rmoveTo(50,-50);
+        r.rmoveTo(0, 50);
+        r.penUp();
     }
 }
 // END main
diff --git a/javacooksrc/javacooksrc/main/java/plotter/PlotterAWT.java b/javacooksrc/javacooksrc/main/java/plotter/PlotterAWT.java
index f52953e..ddaa2f1 100644
--- a/javacooksrc/javacooksrc/main/java/plotter/PlotterAWT.java
+++ b/javacooksrc/javacooksrc/main/java/plotter/PlotterAWT.java
@@ -44,12 +44,17 @@ public void drawBox(int w, int h) {
     }
 
     public void rmoveTo(int incrx, int incry){
-        moveTo(curx += incrx, cury += incry);
+        //the moveTo method will update the curx and cury to the abs coordinates,
+        //so we should not update curx and cury here
+        moveTo(curx + incrx, cury +incry);
     }
 
     public void moveTo(int absx, int absy){
-        if (!penIsUp)
+        //everytime we draw a line we need to repaint to make sure the canvas is updated in every situation
+        if (!penIsUp) {
             g.drawLine(curx, cury, absx, absy);
+            p.repaint();
+        }
         curx = absx;
         cury = absy;
     }