short python non working code with output error!

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
data = pd.read_csv("test_peripheral_dat.csv",encoding = 'utf8')
#import csv file

time=np.cumsum(data['Time step (secs)'])
#this produces expected output (real time)

#now I need to plot time versus each column
#and store in diff files
counter=2
for i in range(len(data.columns)-3):
    #column=data.columns[counter]
    #print(column)
    plotted_data=plt.scatter(x=time, y=data.columns[counter])
    fig = plotted_data.get_figure()
    fig.savefig('{}.png'.format(data.columns[counter]))
    counter+=1

ValueError: x and y must be the same size