diff --git a/README.md b/README.md
index b720886..692ac6d 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ This is a simple python tool that uses sysstat (sar) to plot cpu and ram usage.
 
 Best used with screen:
 
-```console
+```
 $ screen -dmSL chart python sargraph.py
 $ sleep 1
 $ screen -S chart -X stuff "label1\n"
@@ -16,7 +16,7 @@ $ sleep 3
 ```
 
 Or just:
-```console
+```
 $ python sargraph.py
 # wait 1 sec
 # type label1\n
diff --git a/sargraph.py b/sargraph.py
index 5cb57a6..378e52f 100755
--- a/sargraph.py
+++ b/sargraph.py
@@ -124,7 +124,7 @@ labels = []
 f.write("# machine: %s, cpu count: %d\n" % (uname, cpus))
 
 while 1:
-    rlist, _, _ = select([p.stdout, sys.stdin], [], [], 0.5)
+    rlist, _, _ = select([p.stdout, sys.stdin], [], [], 1)
     now = datetime.now()
     if sys.stdin in rlist:
         label_line = sys.stdin.readline().replace("\n", "")