Add Chapter 6 python files and fix grammar issues in readme

thinkcspy/Chapter-6-Exercises/Python-files/problem10.py

@@ -0,0 +1,34 @@
+# Runestone.Academy thinkcspy course
+# Chapter 6
+# Problem 10
+
+import turtle
+
+def drawStar(t):
+    for i in range(5):
+        t.left(144)
+        t.forward(-100)
+
+def drawFiveStars(tt):
+    tt.up()
+    tt.goto(-180,50)
+    tt.down()
+    
+    for i in range(5):
+        drawStar(tt)
+        tt.up()
+        tt.forward(350)
+        tt.right(144)
+        tt.down()
+    
+wn = turtle.Screen()
+wn.bgcolor("tan")
+
+stella = turtle.Turtle()
+stella.color("purple")
+stella.pensize(2)
+stella.speed(10)
+    
+drawFiveStars(stella)
+
+wn.exitonclick()