abc.vbs
do
CreateObject("WScript.Shell").Run "a1.bat",0
wscript.sleep 7200000
CreateObject("WScript.Shell").Run "a2.bat",0
CreateObject("WScript.Shell").Run "b1.bat",0
wscript.sleep 7200000
CreateObject("WScript.Shell").Run "b2.bat",0
CreateObject("WScript.Shell").Run "c1.bat",0
wscript.sleep 7200000
CreateObject("WScript.Shell").Run "c2.bat",0
loop