diff --git a/stepper.py b/stepper.py
index 5dd008c..6b0ddc8 100644
--- a/stepper.py
+++ b/stepper.py
@@ -415,13 +415,14 @@ define i64 @tigermain (i64 %U_mainSL_8, i64 %U_mainDummy_9) {
     heap = [None]
     call_res = []
 
+    step_cnt = 0
     while True:
         (insns, terminator, blocks,
          stack_frames, ssa_env, heap, call_res) = step(insns, terminator, blocks,
                                                        stack_frames, ssa_env,
                                                        global_env, heap, tdecs,
                                                        fdecs, call_res)
-
+        step_cnt += 1
         if terminator is None:
             print('Stepping done! Final ssa_env:\n{}'
                   .format(ssa_env))
@@ -429,6 +430,16 @@ define i64 @tigermain (i64 %U_mainSL_8, i64 %U_mainDummy_9) {
                   format(insns[0][1].val))
             break
 
+        if step_cnt % 100 == 0:
+            print(heap)
+            while True:
+                stop_q = input('We have now done {} steps. Continue? [Y/n]: '
+                               .format(step_cnt)).lower()
+                if stop_q in ['y', 'yes', 'n', 'no', '']:
+                    break
+            if stop_q in ['n', 'no']:
+                break
+
 
 if __name__ == '__main__':
     gogo()