unbonded scroll background for a freerun game

Hi there..i am having troubles with the background of my game...what i am trying to do is make a freerun game... i am planning to have day and night in the game...and i plan to do that by changing the background....I dont want the background to change instantly to a brighter color (for day) or darker color (for night).. so i have played a little bit with the opacity.. i am using the Canvas pluggin..i think i have almost achieved what i am looking for in terms of the transition..from day to night and vice versa.. but..whats irritating me is the lines...that come up everytime the background over laps with its instance.. i am attaching a capx to make it more clear...

Please help.. thanks in advance :)

capx

I think this may help you ;]

youtube.com/watch

I think this may help you ;]

http://www.youtube.com/watch?v=6wdDgqXwzLU&feature=youtu.be&a

Well thanks for trying to help me.. i had seen this before and that is not what i am looking for.. the background on those videos is not on unbounded scrolling..i want the background to continue.. with unbounded scrolling.