diff --git a/learn_c3.py b/learn_c3.py
new file mode 100644
index 0000000..94a9585
--- /dev/null
+++ b/learn_c3.py
@@ -0,0 +1,161 @@
+#!/usr/bin/env python3
+import os, sys
+from random import choice
+
+if sys.platform=='win32' or sys.platform=='darwin':
+	from PySide6.QtWidgets import QApplication, QWidget, QHBoxLayout, QVBoxLayout, QPushButton, QLabel, QFrame, QToolTip, QLineEdit, QSlider, QSizePolicy, QLayout, QTextEdit
+	from PySide6.QtCore import QTimer, Qt, QSize
+	from PySide6.QtGui import (
+		QFont,
+		QImage,
+		QTextDocument,
+		QPixmap,
+		QAction,
+		QIcon,
+	)
+else:
+	from PyQt6.QtWidgets import QApplication, QWidget, QHBoxLayout, QVBoxLayout, QPushButton, QLabel, QFrame, QToolTip, QLineEdit, QSlider, QSizePolicy, QLayout, QTextEdit
+	from PyQt6.QtCore import QTimer, Qt, QSize
+	from PyQt6 import QtCore, QtGui, QtWidgets
+
+	from PyQt6.QtGui import (
+		QFont,
+		QImage,
+		QTextDocument,
+		QPixmap,
+		QAction,
+		QIcon,
+	)
+
+_thisdir = os.path.split(os.path.abspath(__file__))[0]
+C3_LEARN = os.path.join(_thisdir,'c3-learn')
+def ensure_c3_learn():
+	if not os.path.isdir(C3_LEARN):
+		cmd = 'git clone --depth 1 https://github.com/brentharts/c3-learn.git'
+		print(cmd)
+		subprocess.check_call(cmd.split())
+ensure_c3_learn()
+
+def clear_layout(layout):
+	for i in reversed(range(layout.count())):
+		widget = layout.itemAt(i).widget()
+		if widget is not None: widget.setParent(None)
+
+
+
+class LearnC3(QWidget):
+	def __init__(self, zoomout=0):
+		super().__init__()
+		self.zoomout = zoomout
+		self.resize(640, 700)
+		self.setWindowTitle('Learn C3')
+		self.main_vbox = vbox = QVBoxLayout()
+		self.setLayout(self.main_vbox)
+		self.mds = []
+		path = os.path.join(C3_LEARN, 'old/content/Basics')
+		for md in os.listdir(path):
+			if md.endswith('.md'):
+				self.mds.append( os.path.join(path, md) )
+		path = os.path.join(C3_LEARN, 'old/content/More')
+		for md in os.listdir(path):
+			if md.endswith('.md'):
+				self.mds.append( os.path.join(path, md) )
+		path = os.path.join(C3_LEARN, 'old/content/Try')
+		for md in os.listdir(path):
+			if md.endswith('.md'):
+				self.mds.append( os.path.join(path, md) )
+
+		self.load_random()
+		self.show()
+
+	def load_random(self):
+		clear_layout(self.main_vbox)
+		md = choice(self.mds)
+		print('loading:', md)
+		self.setWindowTitle(md)
+		md = open(md).read()
+		html = self.parse_md(md)
+		self.edit = edit = QTextEdit()
+		edit.setHtml(html)
+		if self.zoomout:
+			edit.zoomOut(self.zoomout)
+		self.main_vbox.addWidget(edit)
+
+		btn = QPushButton('next', self.edit)
+		btn.clicked.connect(lambda b: self.load_random())
+
+	def load(self, tag):
+		tag = os.path.sep + tag
+		clear_layout(self.main_vbox)
+		ok = None
+		for md in self.mds:
+			if md.endswith(tag):
+				ok = md
+				break
+		if ok:
+			self.setWindowTitle(md)
+			md = open(md).read()
+			html = self.parse_md(md)
+			self.edit = edit = QTextEdit()
+			edit.setHtml(html)
+			if self.zoomout:
+				edit.zoomOut(self.zoomout)
+			self.main_vbox.addWidget(edit)
+
+			btn = QPushButton('next', self.edit)
+			btn.clicked.connect(lambda b: self.load_random())
+
+	def parse_md(self, md):
+		o = []
+		in_backticks = False
+		for ln in md.splitlines():
+			print(ln)
+			if ln.startswith('title:'):
+				title = ln.split('title:')[-1].strip()
+				o.append('<h2>Example: %s</h2>' % title)
+				continue
+			elif ln.strip()=='---':
+				o.append('<hr/>')
+				continue
+			elif ln.strip()=='```':
+				if in_backticks:
+					in_backticks = False
+					o.append('</pre>')
+				else:
+					in_backticks = True
+					o.append('<pre style="background-color:lightgray">')
+				continue
+			elif ln.startswith('- '):
+				o.append('<span style="font-size:18px">•%s</span>' % ln)
+				continue
+			elif ln.startswith('weight:'):
+				continue
+			elif ln.startswith('{{<start>}}'):
+				continue
+			elif ln.startswith('{{<end'):
+				n = int(ln.split('{{<end')[-1].split('>')[0])
+				html = os.path.join(C3_LEARN, 'old/layouts/shortcodes/end%s.html' % n)
+				assert os.path.isfile(html)
+				for hl in open(html).read().splitlines():
+					if hl.strip().startswith('let defcod'):
+						code = hl[ hl.index('=')+1 : ].strip()
+						code = code.replace('\\t', '\t').replace('\\n', '\n')
+						if code.startswith('"') and code.endswith('";'):
+							code = code[1:-2]
+						code = code.replace('\\"', '"')
+						code = code.replace('<', '&lt;').replace('>', '&gt;')
+						o.append('<h3>C3 Code:</h3><pre>%s</pre>' % code)
+				continue
+			if in_backticks and ln.startswith('//'):
+				o.append('<i style="font-size:16px; background-color:gray; color:white">%s</i>' % ln)
+			elif in_backticks and ln.count('//')==1:
+				a,b = ln.split('//')
+				o.append('%s\t\t<i style="font-size:12px; background-color:gray; color:white">//%s</i>' % (a,b))
+			else:
+				o.append(ln)
+		return '<br/>'.join(o)
+
+if __name__=='__main__':
+		app = QApplication(sys.argv)
+		window = LearnC3()
+		sys.exit( app.exec() )