import numpy as np
import pandas as pd

time_ = 150

surface_temp = pd.DataFrame(np.arange(time+1), columns=['time'])
surface_temp['temperature']=0
surface_temp['value']=0

m = 1 #multiplyer

surface_temp.temperature.iloc[0:10] = -5
surface_temp.temperature.iloc[10:25] = 0
surface_temp.temperature.iloc[25:50] = -15
surface_temp.temperature.iloc[50:90] = 0
surface_temp.temperature.iloc[90:100] = -15
surface_temp.temperature.iloc[100:120] = 0
surface_temp.temperature.iloc[120:130] = -15
surface_temp.temperature.iloc[130:150] = 0

surface_temp.value[df.temperature == 0] = 1
surface_temp.value[df.temperature == -5] = 2
surface_temp.value[df.temperature== -15] = 3