diff --git a/apple410/plot_to_cairo.py b/apple410/plot_to_cairo.py
index 8be1d5f..6d8724a 100755
--- a/apple410/plot_to_cairo.py
+++ b/apple410/plot_to_cairo.py
@@ -168,6 +168,42 @@ class CairoPlotter:
             p=self.context.get_current_point()
         self.context.arc(p[0],p[1],r,0.0,math.pi*2)
 
+    def yt(self, params):
+        l=coordlist(params,5)
+        left = l[3]
+        right = l[4]
+        num = int(l[2])
+        if l[0]:
+            dist = l[1]
+            tw = dist/num
+        else:
+            dist = l[1]*num
+            tw = l[1]
+        (x,y) = self.context.get_current_point()
+        self.context.line_to(x,y+dist)
+        for i in range(num):
+            y1 = y + tw*(i+1)
+            self.context.move_to(x+left,y1)
+            self.context.line_to(x-right,y1)
+
+    def xt(self, params):
+        l=coordlist(params,5)
+        above = l[3]
+        below = l[4]
+        num = int(l[2])
+        if l[0]:
+            dist = l[1]
+            tw = dist/num
+        else:
+            dist = l[1]*num
+            tw = l[1]
+        (x,y) = self.context.get_current_point()
+        self.context.line_to(x+dist,y)
+        for i in range(num):
+            x1 = x + tw*(i+1)
+            self.context.move_to(x1,y+above)
+            self.context.line_to(x1,y-below)
+
     def ac(self,params):
         l=coordlist(params)
         r=l[0]