diff --git a/core/__init__.py b/pycore/__init__.py
similarity index 100%
rename from core/__init__.py
rename to pycore/__init__.py
diff --git a/pycore/__init__.pyc b/pycore/__init__.pyc
new file mode 100644
index 0000000..e9f05b6
Binary files /dev/null and b/pycore/__init__.pyc differ
diff --git a/core/blocks.py b/pycore/blocks.py
similarity index 100%
rename from core/blocks.py
rename to pycore/blocks.py
diff --git a/core/tikzeng.py b/pycore/tikzeng.py
similarity index 100%
rename from core/tikzeng.py
rename to pycore/tikzeng.py
diff --git a/pycore/tikzeng.pyc b/pycore/tikzeng.pyc
new file mode 100644
index 0000000..ed1ff6e
Binary files /dev/null and b/pycore/tikzeng.pyc differ
diff --git a/test/test_simple.py b/pyexamples/test_simple.py
similarity index 96%
rename from test/test_simple.py
rename to pyexamples/test_simple.py
index 1da1833..e90b0a1 100644
--- a/test/test_simple.py
+++ b/pyexamples/test_simple.py
@@ -1,7 +1,7 @@
 
 import sys
 sys.path.append('../')
-from core.tikzeng import *
+from pycore.tikzeng import *
 
 # defined your arch
 arch = [
diff --git a/test/unet.py b/pyexamples/unet.py
similarity index 97%
rename from test/unet.py
rename to pyexamples/unet.py
index dee71f0..25ddd3f 100644
--- a/test/unet.py
+++ b/pyexamples/unet.py
@@ -1,8 +1,8 @@
 
 import sys
 sys.path.append('../')
-from core.tikzeng import *
-from core.blocks  import *
+from pycore.tikzeng import *
+from pycore.blocks  import *
 
 arch = [ 
     to_head('..'), 
@@ -49,4 +49,4 @@ def main():
 
 if __name__ == '__main__':
     main()
-    
\ No newline at end of file
+    
diff --git a/tikzmake.sh b/tikzmake.sh
index 1c4b6d6..9fbc082 100644
--- a/tikzmake.sh
+++ b/tikzmake.sh
@@ -7,5 +7,5 @@ pdflatex $1.tex
 rm *.aux *.log *.vscodeLog
 rm *.tex
 
-evince $1.pdf
+xdg-open $1.pdf