Help with oscilloscope

Hello, I am working for my project. I actually am working on signal analysis,so,i am not much used to programming and all. For my presentation,i want to display some signals on a screen,interfacing the screen to the arduino was handled by my friends. They said, i will get oscilloscope code where output is given on screen can be easily found. Can anyone give me some link for arduino,where i manually input the signal and i am able to present it on screen. I just want it as a part of my presentation,so i dont need any advance stuff. i can handle giving the input in different forms as the software requires,but i dont know what to do next. Kindly help. Thank you.

What do you mean by this?

,where i manually input the signal

There are lots of arduino / Processing oscilloscope projects about, just google them but they all involve putting an analogue signal into an analogue input and recording the results on a computer screen driven by the processing language.

Hello, I am sorry,i guess i was not clear enough. I want to display the signal on a screen. The screen is MI0283QT2 . And we have a shield connected to it. Most the code i could find included something called as Processing. Also, we must be able to enter the frequency here manually,like 1Mhz,etc,and just simple display on the screen. I hope i am clear enough.. I am a noob in arduino.. =(

Most the code i could find included something called as Processing.

Processing is a free computer language you run on your computer. It can talk to the arduino.

The screen is MI0283QT2 . And we have a shield connected to it.

You are asking for something very specific, I am not sure if you will find anything ready to run. This forum is mainly about teaching people how to do things themselves.

Also, we must be able to enter the frequency here manually,like 1Mhz,etc,and just simple display on the screen.

No that is not how oscilloscopes work. You do not do this, you enter the speed of the X sweep in terms of time per cm not frequency.