From 003ea2f9d47cd6407fbb4d95153f32926e401a39 Mon Sep 17 00:00:00 2001
From: YuCheng Hu <yuchenghu@ossez.com>
Date: Fri, 5 Mar 2021 15:34:06 -0500
Subject: [PATCH] =?UTF-8?q?=E5=B0=86=E6=B5=8B=E8=AF=95=E7=9A=84=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6=E8=BF=9B=E8=A1=8C=E6=8F=90=E4=BA=A4?=
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---
 tests/HelloWorld.py |   9 +++
 tests/USAFlag.py    | 140 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 149 insertions(+)
 create mode 100644 tests/HelloWorld.py
 create mode 100644 tests/USAFlag.py

diff --git a/tests/HelloWorld.py b/tests/HelloWorld.py
new file mode 100644
index 0000000..59565af
--- /dev/null
+++ b/tests/HelloWorld.py
@@ -0,0 +1,9 @@
+# 第一个 Python 程序 - Hello, World!
+# Version: 0.1
+# Author: YuCheng Hu
+
+
+print('hello, world!')
+print('你好', '世界')
+print('hello', 'world', sep=', ', end='!')
+print('goodbye, world', end='!\n')
diff --git a/tests/USAFlag.py b/tests/USAFlag.py
new file mode 100644
index 0000000..894c9be
--- /dev/null
+++ b/tests/USAFlag.py
@@ -0,0 +1,140 @@
+# Python script to create USA flag using turtle.
+# Author - https://www.ossez.com
+
+import turtle
+import time
+
+# create a screen
+screen = turtle.getscreen()
+# set background color of screen
+screen.bgcolor("white")
+# set tile of screen
+screen.title("USA Flag - https://www.ossez.com")
+# "Yesterday is history, tomorrow is a mystery, 
+# but today is a gift. That is why it is called the present.”
+# — Oogway to Po, under the peach tree, Kung Fu Panda Movie
+oogway = turtle.Turtle()
+# set the cursor/turtle speed. Higher value, faster is the turtle
+oogway.speed(100)
+oogway.penup()
+# decide the shape of cursor/turtle
+oogway.shape("turtle")
+
+# flag height to width ratio is 1:1.9
+flag_height = 250
+flag_width = 475
+
+# starting points
+# start from the first quardant, half of flag width and half of flag height
+start_x = -237
+start_y = 125
+
+# For red and white stripes (total 13 stripes in flag), each strip width will be flag_height/13 = 19.2 approx
+stripe_height = flag_height / 13
+stripe_width = flag_width
+
+# length of one arm of star
+star_size = 10
+
+
+def draw_fill_rectangle(x, y, height, width, color):
+    oogway.goto(x, y)
+    oogway.pendown()
+    oogway.color(color)
+    oogway.begin_fill()
+    oogway.forward(width)
+    oogway.right(90)
+    oogway.forward(height)
+    oogway.right(90)
+    oogway.forward(width)
+    oogway.right(90)
+    oogway.forward(height)
+    oogway.right(90)
+    oogway.end_fill()
+    oogway.penup()
+
+
+def draw_star(x, y, color, length):
+    oogway.goto(x, y)
+    oogway.setheading(0)
+    oogway.pendown()
+    oogway.begin_fill()
+    oogway.color(color)
+    for turn in range(0, 5):
+        oogway.forward(length)
+        oogway.right(144)
+        oogway.forward(length)
+        oogway.right(144)
+    oogway.end_fill()
+    oogway.penup()
+
+
+# this function is used to create 13 red and white stripes of flag
+def draw_stripes():
+    x = start_x
+    y = start_y
+    # we need to draw total 13 stripes, 7 red and 6 white
+    # so we first create, 6 red and 6 white stripes alternatively    
+    for stripe in range(0, 6):
+        for color in ["red", "white"]:
+            draw_fill_rectangle(x, y, stripe_height, stripe_width, color)
+            # decrease value of y by stripe_height
+            y = y - stripe_height
+
+            # create last red stripe
+    draw_fill_rectangle(x, y, stripe_height, stripe_width, 'red')
+    y = y - stripe_height
+
+
+# this function create navy color square
+# height = 7/13 of flag_height
+# width = 0.76 * flag_height
+# check references section for these values
+def draw_square():
+    square_height = (7 / 13) * flag_height
+    square_width = (0.76) * flag_height
+    draw_fill_rectangle(start_x, start_y, square_height, square_width, 'navy')
+
+
+def draw_six_stars_rows():
+    gap_between_stars = 30
+    gap_between_lines = stripe_height + 6
+    y = 112
+    # create 5 rows of stars
+    for row in range(0, 5):
+        x = -222
+        # create 6 stars in each row
+        for star in range(0, 6):
+            draw_star(x, y, 'white', star_size)
+            x = x + gap_between_stars
+        y = y - gap_between_lines
+
+
+def draw_five_stars_rows():
+    gap_between_stars = 30
+    gap_between_lines = stripe_height + 6
+    y = 100
+    # create 4 rows of stars
+    for row in range(0, 4):
+        x = -206
+        # create 5 stars in each row
+        for star in range(0, 5):
+            draw_star(x, y, 'white', star_size)
+            x = x + gap_between_stars
+        y = y - gap_between_lines
+
+
+# start after 5 seconds.
+time.sleep(5)
+# draw 13 stripes
+draw_stripes()
+# draw squares to hold stars
+draw_square()
+# draw 30 stars, 6 * 5
+draw_six_stars_rows()
+# draw 20 stars, 5 * 4. total 50 stars representing 50 states of USA
+draw_five_stars_rows()
+# hide the cursor/turtle
+oogway.hideturtle()
+# keep holding the screen until closed manually
+screen.mainloop()