<html> <head> <title>Servant: counter</title> <style> body { text-align: center; } #counter { color: green; } #inc { margin: 0px 20px; background-color: green; color: white; } </style> </head> <body> <iframe src="vanilla/" width="80%" height="25%"></iframe> <iframe src="jquery/" width="80%" height="25%"></iframe> <iframe src="angular/" width="80%" height="25%"></iframe> <iframe src="angular/service.html" width="80%" height="25%"></iframe> </body> </html>