diff --git a/chess_floor_ethan.py b/chess_floor_ethan.py
new file mode 100644
index 0000000000000000000000000000000000000000..bda879486399fcdd05232aacc0e996fe6fce75bf
--- /dev/null
+++ b/chess_floor_ethan.py
@@ -0,0 +1,27 @@
+import turtle as t
+t.setup(500, 500)
+t.speed('fastest')
+def block(size, filled):
+    if filled == True:
+        t.begin_fill()
+    for c in range(4):
+        t.forward(size)
+        t.right(90)
+    if filled == True:
+        t.end_fill()
+
+size = 10
+num = 2
+filled = True
+for c in range(1, num*num+1):
+    block(size, filled)
+    if c%num == 0:
+        t.sety(t.ycor()-size)
+        t.setx(0)
+    else:
+        t.forward(size)
+        if filled == True:
+            filled = False
+        else:
+            filled = True
+t.done()
\ No newline at end of file
diff --git a/decode_ethan.py b/decode_ethan.py
new file mode 100644
index 0000000000000000000000000000000000000000..0b8e7bd2dcfcc357823a347b9008953a57fecbe6
--- /dev/null
+++ b/decode_ethan.py
@@ -0,0 +1,3 @@
+n = [0b1000101, 0b1000100, 0b1001111, 0b1010100, 0b1001101]
+for c in range(len(n)):
+    print(chr(n[c]), end='')
\ No newline at end of file
diff --git a/emoji_ethan.py b/emoji_ethan.py
new file mode 100644
index 0000000000000000000000000000000000000000..0e956c474359bcd6fb380e14b2b1f3c579864f2f
--- /dev/null
+++ b/emoji_ethan.py
@@ -0,0 +1,3 @@
+for c in range(0x2000, 0x33ff):
+    print(chr(c), end='')
+#♔♕♖♗♘♙♚♛♜♝♞♟♠♡♢♣♤♥♦♧
\ No newline at end of file
diff --git a/ex13_1.txt b/ex13_1.txt
deleted file mode 100644
index d37e06eaa69eecda2b36cb1195c48fae2bcdb2c0..0000000000000000000000000000000000000000
--- a/ex13_1.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-知识点: 填充色、多重循环
-
-Ex13.1 四方格
-=============
-
-同学们都能轻轻松松画出一个正方形，甚至给它填充颜色，所以这道习题我们增加一点难度。
-
-** 任务描述 **
-
-1. 用海龟作图绘制一个2*2的四方格
-2. 把左上角和右下角的两个格子涂成黑色
-3. 保留右上角和左下角两个格子的白色
-
-** 提交方式 **
-
-1. 将程序文件名保存为square_<name>.py，其中<name>是你的名字。例如square_cindy.py
-2. 将程序提交(commit)到本地仓库
-3. 将这个提交推送(push)到你的码云仓库
-4. 创建一个Pull Request(PR)到 Moleqode/pratice 项目的exercise分支
-
diff --git a/names.txt b/names.txt
deleted file mode 100644
index 851fa897d771726447d0c1130a6e7fb040f85b62..0000000000000000000000000000000000000000
--- a/names.txt
+++ /dev/null
@@ -1 +0,0 @@
-# add your name as a separate line at the end of the file
\ No newline at end of file