--- nand.py-
+++ nand.py
@@ -5,10 +5,11 @@
 import select
 
 class Obj:
-	def __init__(self, parent, name, latency=None):
+	def __init__(self, parent, name, latency=None, pos=(0,0)):
 		self.parent = parent
 		self.name = name
 		self.latency = latency
+		self.pos = pos
 		if parent:
 			setattr(parent, name, self)
 
@@ -23,6 +24,11 @@
 	def enque(self, f, *args):
 		sched.enque(self.latency, f, *args)
 
+	def get_pos(self):
+		(px, py) = self.parent.get_pos() if self.parent else (0,0)
+		(x, y) = self.pos
+		return (px + x, py + y)
+
 class Pin(Obj):
 	def __init__(self, parent, name, v=None):
 		Obj.__init__(self, parent, name)
@@ -302,13 +308,26 @@
 		self.not_.out.conn = Pin(self, 'out')
 
 class Lamp(Obj):
-	def __init__(self, parent, name='lamp', latency=None):
-		Obj.__init__(self, parent, name, latency)
+	def __init__(self, parent, name='lamp', latency=None, pos=(0,0)):
+		Obj.__init__(self, parent, name, latency, pos)
 		Pin(self, 'inp')
 
 	def update(self):
-		msg = str_v( self.inp.v )
+		v = self.inp.v
+		msg = str_v(v)
 		self.enque( self.dbgout, (msg, True) )
+		self.enque( self.show, v )
+
+	def show(self, v):
+		(x, y) = self.get_pos()
+		lst = [
+			'ESC[{};{}H'.format(y+1, x+1), # move
+			'ESC[{}m'.format(7) if v else '', # reverse on if v
+			self.name,
+			'ESC[{}m'.format(27) if v else '', # reverse off if v
+		]
+		print ''.join(lst)
+		sys.stdout.flush()
 
 class Sched:
 	def __init__(self):