refactored if fi to && || in wait function

demo.sh

@@ -8,11 +8,9 @@ function simtyping()
 
 function wait()
 {
-    if [ "$PROMPT_TIMEOUT" == "-1" ]; then
+    [ "$PROMPT_TIMEOUT" == "-1" ] && 
-        read -rs
+        read -rs ||
-    else
         read -rst "$PROMPT_TIMEOUT"
-    fi
 }
 
 function type()