diff --git a/AlgebraicDataflowArchitectureModel/models/Twitter.model b/AlgebraicDataflowArchitectureModel/models/Twitter.model
index 5d5c34b..649abac 100644
--- a/AlgebraicDataflowArchitectureModel/models/Twitter.model
+++ b/AlgebraicDataflowArchitectureModel/models/Twitter.model
@@ -1,5 +1,9 @@
-channel CIO(myId:Str) {
-	out accounts.{myId}.tweets(t1:List, tweet(text:Str, time:Long)) == cons(tuple(time, text), t1)
+channel CIO1(myId:Str) {
+	out accounts(ac:List, signup(name:Str)) == cons(tuple(name, nil, nil), t1)
+}
+
+channel CIO2(id:Str) {
+	out accounts.{id}.tweets(t1:List, tweet(text:Str, time:Long)) == cons(tuple(time, text), t1)
 }
 
 channel C(myId:Str; m:Json) {