OrchLab Soundmakers are a set of web-browser based instruments that you can use on a computer, tablet or mobile phone. The instruments available are called Circles, Squares, Percussion and Lines. Below you can find a video which introduces Lines to you. Feel free to use this as a starting point and then be as creative as you like with the different sounds!
An introduction to Lines
Explore more:
Using OrchLab Soundmakers for music: Percussion
Using OrchLab Soundmakers for music: Squares
Using OrchLab Soundmakers for music: Circles