Made an etch-a-sketch and turtle race game!

Update README.md

Day 19/README.md

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+# Day 19 - Instances, State, and Higher Order Functions
+
+- Built an etch-a-sketch while understanding higher order functions
+- Simulated a turtle race with randomized steps using class instances
+
+## Etch-a-Sketch
+
+![Day_19_Etch_A_Sketch](https://user-images.githubusercontent.com/30333942/128927402-10006522-2640-4569-b6d0-706cca4fc811.gif)
+
+This etch-a-sketch uses higher order functions to run when keys are pressed on the keyboard.
+- **w** - Move forwards
+- **s** - Move backwards
+- **a** - Turn left
+- **d** - Turn right
+- **c** - Reset etch-a-sketch
+
+## The Great Turtle Race
+
+![Day_19_The_Great_Turtle_Race](https://user-images.githubusercontent.com/30333942/128927073-cf125780-b3ce-432e-8808-c4ac4d2c6e34.gif)
+
+The Great Turtle Race uses multiple instances of the Turtle object from [the turtle module](https://docs.python.org/3/library/turtle.html) that move by a random number of steps to the edge of the screen.

Day 19/etch-a-sketch.py

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+from turtle import Turtle, Screen
+
+arrow = Turtle()
+screen = Screen()
+
+def move_forwards():
+    arrow.forward(10)
+
+def move_backwards():
+    arrow.backward(10)
+
+def clockwise():
+    arrow.right(10)
+
+def counter_clockwise():
+    arrow.left(10)
+
+def clear_drawing():
+    arrow.reset()
+
+screen.listen()
+screen.onkey(key="w", fun=move_forwards) # higher order function
+screen.onkey(key="s", fun=move_backwards)
+screen.onkey(key="d", fun=clockwise)
+screen.onkey(key="a", fun=counter_clockwise)
+screen.onkey(key="c", fun=clear_drawing)
+screen.exitonclick()

Day 19/turtle-race.py

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+from turtle import Turtle, Screen
+import random
+
+# Game settings
+is_race_on = False
+screen = Screen()
+screen.title("The Great Turtle Race!")
+screen.setup(width=500, height=400)
+
+# Get user guess
+user_selection = ""
+while not user_selection:
+    user_selection = screen.textinput(title="Who will win?", prompt="Which turtle will win the race?\nType blue, green, red, orange, turquoise, or purple.\nEnter a color: ")
+
+# Setup turtle objects after input
+colors = ["blue", "green", "turquoise", "orange", "red", "purple"]
+turtles = [Turtle(shape="turtle") for turtle in range(6)]
+for i in range(6):
+    turtles[i].color(colors[i])
+    turtles[i].penup()
+    turtles[i].goto(x=-230, y=-100+(i*40))
+
+# Start race!
+result = Turtle()
+result.penup()
+result.hideturtle()
+result.goto(x=0, y=100)
+is_race_on = True
+while is_race_on:
+    for turtle in turtles:
+        # Move turtle forward a random distance
+        rand_distance = random.randint(0, 10)
+        turtle.forward(rand_distance)
+        # Check if a turtle won the race
+        if turtle.xcor() > 230:
+            is_race_on = False
+            winning_color = turtle.pencolor()
+            if winning_color == user_selection:
+                result.write(f"You've won! The {winning_color} turtle is the winner!", align="center", font=("Open Sans", 16, "normal"))
+            else:
+                result.write(f"You've lost! The {winning_color} turtle is the winner!", align="center", font=("Open Sans", 16, "normal"))
+
+screen.exitonclick()