diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
new file mode 100644
index 0000000..105ce2d
--- /dev/null
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..1983bd7
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.11 (random-password)" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.11 (random-password)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..646ab18
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/random-password.iml" filepath="$PROJECT_DIR$/.idea/random-password.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/random-password.iml b/.idea/random-password.iml
new file mode 100644
index 0000000..74d515a
--- /dev/null
+++ b/.idea/random-password.iml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/venv" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/README.md b/README.md
index 189092e..a4a5d38 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,4 @@
-# random-password
\ No newline at end of file
+# random-password
+This program is not very good.\
+It save use base64.\
+It can only create 2\ 4\ 6\ 8\ 16 byte's password.
\ No newline at end of file
diff --git a/password.py b/password.py
new file mode 100644
index 0000000..75c2a33
--- /dev/null
+++ b/password.py
@@ -0,0 +1,23 @@
+import random
+import base64
+LETTERS = ["q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","n","m"] # password's all letter
+NUMBERS = [1,2,3,4,5,6,7,8,9] # password's all number
+OTHERS = ["`","-","=","[","]",'\\',";","'",".",",","/","~","!","@","#","$","%","^","&","*","(",")","_","+","{","}","|",":","\"","<",">","?"] # password's all fuhao
+
+def create_password(byte: int):
+    password = ""
+    letter_byte = random.randrange(0,byte)
+    number_byte = random.randrange(0,byte-letter_byte)
+    other_byte = byte-letter_byte-number_byte
+    print(letter_byte,number_byte,other_byte)
+    for _ in range(letter_byte):
+        password += random.choice(LETTERS)
+    for _ in range(number_byte):
+        password += str(random.choice(NUMBERS))
+    for _ in range(other_byte):
+        password += random.choice(OTHERS)
+    return password
+
+
+
+print(create_password(9))