Put multiple columns in scatter 3d

hi, im new, i need put many column in Y, but i cant, only show 1 column= A1, but i need show: a1+a2+a3…
z= year(2018,2019, 2020)
x= month(january, february…)

please help me.

Mi code:

import plotly.graph_objects as go
import plotly.express as px
import pandas as pd
df = pd.read_csv('matlab2.csv')
df.head(13)
año	mes	a1	a2	a3	a4	a5	a6	a7	a8	...	a127	a128	a129	a130	a131	a132	a133	a134	a135	a136
0	2018	enero	335	253	326	346	266	280	552	1	...	0	0	0	0	0	0	
1	2018	febrero	233	208	298	278	309	307	387	131	...	0	0	0	0	0	0	
2	2018	marzo	196	177	351	356	317	333	376	105	...	0	0	0	0	0	0	
3	2018	abril	146	235	379	283	175	337	310	123	...	0	0	0	0	0	0	0	
4	2018	mayo	145	232	422	461	95	387	322	135	...	0	0	0	0	0	0	
5	2018	junio	131	220	328	300	139	348	314	216	...	0	0	0	0	0	0	0	
6	2018	julio	149	218	354	291	272	242	339	191	...	0	0	0	0	0	0	0	
7	2018	agosto	135	224	295	281	209	325	340	172	...	0	0	0	0	0	0	
8	2018	septiembre	152	205	294	235	193	271	248	86	...	0	0	0	0	0	
9	2018	octubre	154	246	312	257	324	284	284	511	...	0	0	0	0	0	0	
10	2018	noviembre	211	209	262	269	154	283	408	439	...	0	0	0	0	0	0	
11	2018	diciembre	90	125	163	235	82	291	309	201	...	0	0	0	0	0	0	
12	2019	enero	267	264	301	391	114	204	430	104	...	0	0	0	0	0	0	



mesall=df.iloc[0:26,1]
yearall=df.iloc[0:26,0]
clien=df.iloc[0:26,2:4]
fig = px.scatter_3d(df, x=yearall, z=clien, y=mesall,width=800, height=800 )
fig.show()

ValueError: Wrong number of items passed 2, placement implies 1


working only chosse one colum:
fig = px.scatter_3d(df, x=yearall, z='a1', y=mesall,width=800, height=800 )
fig.show()