1. cd to the phhotoreceptor-master directory
2. Copy the phhotoreceptor directory with its contents into scripts/shunt_peaking
cp -rp phhotoreceptor scripts/shunt_peaking
3. cd to scripts/shunt_peaking
4. Use python3 to execute one of the Fig*py files
python3 Fig2c.py
or simply
./Fig2c.py

The GitHub repository for this model is https://github.com/fjhheras/phhotoreceptor