Blender render layers

Hey guys I just recently started to learn how to use blender.
Today I was working on something, but when I click the render button to render the final scene, nothing shows up, it is all blank. I think I accidentally delete the render layers in node editor, can any one tell me how to fix this problem?

Says sequence on the render result which means you likely have a strip in video sequence editor and it’s not a scene strip, so it renders the sequencer instead of the scene. Either remove the strip or disable sequencer in render properties -> post processing.