Animation

I have solved a 2D geometric problem with Grasshopper ... It is about moving points along some curves and parametrisation of the points ... Now I have got it all done ... the slider t is a parameter from 0 to 1 an it controls the whole motion ... I ask myself if there is any possibility that can move t from 0 to 1 "automatically"? I ask myself if there is a possibility that can give a specific line some colour, when t = 1 ? ... Is something like this possible? ... Thank you very much for the help in advance ...