I added the goals to the Yahtzee game.

Checkpoint 3:
My experience working with OOP is that I understand most of it but is still a little confusing.  I wasn't able to figure out all of the goals for the game.  This is different than how I would have written the program in units 1 and 2 as I would have just made a bunch of functions and called them throughout my code.  Now we can use classes.

play.py

@@ -3,12 +3,22 @@ from yahtzee_goals import (
     GoalOnes, 
     GoalTwos, 
     GoalThrees,
+    GoalFours,
+    GoalFives,
+    GoalSixes,
+    GoalThreeofaKind,
+    GoalFourofaKind
 )
 
 goals = [
     GoalOnes(), 
     GoalTwos(),
     GoalThrees(),
+    GoalFours(),
+    GoalFives(),
+    GoalSixes(),
+    GoalThreeofaKind(),
+    GoalFourofaKind()
 ]
 
 game = Yahtzee(goals)

yahtzee_goals.py

@@ -40,3 +40,93 @@ class GoalThrees:
             if die.face == 3:
                 total += 3
         return total
+
+class GoalFours:
+    "Four points for each four"
+
+     def prompt(self, dice):
+        potential_score = self.score(dice)
+        return f"Fours ({potential_score})"
+
+    def score(self, dice):
+        total = 0
+        for die in dice:
+            if die.face == 4:
+                total += 4
+        return total
+
+class GoalFives:
+    "Five points for each five"
+
+     def prompt(self, dice):
+        potential_score = self.score(dice)
+        return f"Fives ({potential_score})"
+
+    def score(self, dice):
+        total = 0
+        for die in dice:
+            if die.face == 5:
+                total += 5
+        return total
+
+class GoalSixes:
+    "Six points for each six"
+
+     def prompt(self, dice):
+        potential_score = self.score(dice)
+        return f"Sixes ({potential_score})"
+
+    def score(self, dice):
+        total = 0
+        for die in dice:
+            if die.face == 6:
+                total += 6
+        return total
+
+class GoalThreeofaKind:
+    "3*number points for each number"
+
+     def prompt(self, dice):
+        potential_score = self.score(dice)
+        return f"ThreeofaKind ({potential_score})"
+
+    def score(self, dice):
+        total = 0
+        for die in dice:
+            if die.face == 1:
+                total += 1*3
+            if die.face == 2:
+                total += 2*3
+            if die.face == 3:
+                total += 3*3
+            if die.face == 4:
+                total += 4*3
+            if die.face == 5:
+                total += 5*3
+            if die.face == 6:
+                total += 6*3
+        return total
+
+class GoalFourofaKind:
+    "4*number points for each number"
+
+     def prompt(self, dice):
+        potential_score = self.score(dice)
+        return f"FourofaKind ({potential_score})"
+
+    def score(self, dice):
+        total = 0
+        for die in dice:
+            if die.face == 1:
+                total += 1*4
+            if die.face == 2:
+                total += 2*4
+            if die.face == 3:
+                total += 3*4
+            if die.face == 4:
+                total += 4*4
+            if die.face == 5:
+                total += 5*4
+            if die.face == 6:
+                total += 6*4
+        return total