diff --git a/examples/CompWaveform/CompWaveform.ino b/examples/CompWaveform/CompWaveform.ino
index 2b93b57..b05cbc8 100644
--- a/examples/CompWaveform/CompWaveform.ino
+++ b/examples/CompWaveform/CompWaveform.ino
@@ -16,9 +16,21 @@
 #include "NexText.h"
 #include "NexWaveform.h"
 
+#define LEVEL_HIGH      (30)
+#define LEVEL_LOW       (0)
+
+#define CH0_OFFSET  (40 - LEVEL_HIGH/2)
+#define CH1_OFFSET  (CH0_OFFSET + 40 * 1)
+#define CH2_OFFSET  (CH0_OFFSET + 40 * 2)
+#define CH3_OFFSET  (CH0_OFFSET + 40 * 3)
+
+
 NexWaveform s0 = NexWaveform(0, 1, "s0");
 
-static uint8_t data = 0;
+static uint8_t ch0_data = LEVEL_LOW;
+static uint8_t ch1_data = LEVEL_LOW;
+static uint8_t ch2_data = LEVEL_LOW;
+static uint8_t ch3_data = LEVEL_LOW;
 
 void setup(void)
 {
@@ -28,13 +40,28 @@ void setup(void)
 
 void loop(void)
 {
-    data++;
-    data += random(0, 5);
-    if (data > 200)
+    static uint32_t started = 0;
+    if (millis() - started >= 2000)
     {
-        data = 0;
+        started = millis();    
+        if (LEVEL_HIGH == ch0_data)
+        {
+            ch0_data = LEVEL_LOW;
+        }
+        else
+        {
+            ch0_data = LEVEL_HIGH;
+        }
     }
-    s0.addValue(0, data);
-    s0.addValue(1, data % 40 + 80);
+    
+    ch1_data = ch0_data + random(0, 2);
+    ch2_data = ch0_data + random(0, 5);
+    ch3_data = ch0_data + random(0, 8);
+    
+    s0.addValue(0, CH0_OFFSET + ch0_data);
+    s0.addValue(1, CH1_OFFSET + ch1_data);
+    s0.addValue(2, CH2_OFFSET + ch2_data);
+    s0.addValue(3, CH3_OFFSET + ch3_data);
+    
 }