Use fully customizable graphs in your project with eGraph Engine. You just need to include the extension and use scripts:
graph_id = egraph_create(x,y,width,height); value = egraph_get_val(graph_id);
And It will return the value for the current time of the graph.
The graphs are fully customizable, meaning that you can change all values like: size, position, grid size, time speed, snap, loopable, text, min/max values, easing mode, colors, etc. The graphs can also be resized at real time, you can also set a sprite as the sprite_index of the graph and it will adapt to the sprite's size.