diff --git a/DMX-2.0/SequenceurLineaire.cs b/DMX-2.0/SequenceurLineaire.cs
index c9c0f33..5f70dcd 100644
--- a/DMX-2.0/SequenceurLineaire.cs
+++ b/DMX-2.0/SequenceurLineaire.cs
@@ -363,7 +363,7 @@ namespace DMX2
 		}
 
 		private class circEvTarget : IEventTarget{
-			Circuit c; SequenceurLineaire seq;
+			Circuit c; SequenceurLineaire seq; int s=-2; bool ok=false;
 			public circEvTarget(SequenceurLineaire _seq, Circuit _c){
 				c=_c;
 				seq=_seq;
@@ -371,6 +371,13 @@ namespace DMX2
 			#region IEventTarget implementation
 			bool IEventTarget.FireEvent (EventData data)
 			{
+				if (!ok) {
+					int val = seq.ValeurBruteCircuit (c);
+					int cs = Math.Sign (val - data.value);
+					if (s == -2) s =cs;
+					if (cs==0 || cs!=s) ok=true;
+					else return true ;
+				}
 				seq.ChangeValeur(c,data.value);
 				return true;
 			}