Fix README.

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

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", "")