I have lost my dock icon from dock bar. i did two finger moment. now i want to get dock back to dock bar.

I have lost dock from dock bar and even few more application like note and system perference. I did try to restore them as it is but could not relocate those. Please help me to get my dock back as i think its trashed now.

Thank you

I hope i am clear. I have lock the icon of dock and notepad from belowed dock bar. as i was learning the launchpad and put my two fingers on them and draged and those got transhed.

i need those icon back as it was in past