diff --git a/timeline_editor/digitspan_block.py b/timeline_editor/digitspan_block.py
new file mode 100644
index 0000000..8c9e1e6
--- /dev/null
+++ b/timeline_editor/digitspan_block.py
@@ -0,0 +1,47 @@
+import streamlit as st
+import json
+from enum import Enum
+
+class HudWidgetPosition(Enum):
+  Hidden = "Hidden"
+  StatusBarLeft = "Status bar (left)"
+  StatusBarCenter = "Status bar (center)"
+  StatusBarRight = "Status bar (right)"
+  InformationPanel = "Information Panel"
+
+class DigitSpanBlock():
+
+  Name = "Woods2011"
+  InterstimulusInterval = 1
+  RetentionDelay = 1
+  BlockCounterPosition: HudWidgetPosition = HudWidgetPosition.Hidden
+
+  def __init__(self):
+    st.title("DigitSpan - Block Generator")
+    
+    self.InterstimulusInterval = st.sidebar.number_input(
+      "Interstimulus Interval (millis)", 
+      min_value=0, 
+      step=1)
+
+    self.RetentionDelay = st.sidebar.number_input(
+      "Retention Delay (millis)", 
+      min_value=0, 
+      step=1)
+
+    self.BlockCounterPosition = self.enum_input("Block Counter Position", self.BlockCounterPosition)
+
+    # show output json
+    st.header("")
+    st.json(json.dumps(self.__dict__))
+
+  def enum_input(self, text, param):
+    options = list(map(lambda e: e.name, param.__class__))
+    widget = st.sidebar.selectbox(
+      text,
+      options,
+      format_func=lambda k: param.__class__[k].value)
+    return widget
+
+if __name__ == "__main__":
+  app = DigitSpanBlock()