How can I fit multiple curve to one curve?

Hello!
I have a curve wich is the result of an experiment. Now I need to find some curves that will be superimposed and make this curve . I have attached a picture. Actually I have the dark curve and I need the red curves (I have their general mathemtical formulation but I need to tune some parameters). Could you please help me with this problem?
Regards,
Faezeh

 Accepted Answer

Do you know them to be gaussians? If so, try this attached demo.

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