f=[0,1]
r=''
for i in range(99):f+=[f[i]+f[i+1]];r+=str(f[i])
r=r.replace('215','25')
s=[['']*24 for i in[0]*24]
x,y=11,12
s[x][x]=d=0
a=[0,1,0,-1]
z=2
i=c=1
while 0<=y:
if c==z//2:d=(d+1)%4;c=0;z+=1
s[x][y]=r[i];x+=a[d];y+=a[(d+1)%4];i+=1;c+=1
for l in s:print(*l)
Note that non-ascii characters in the above source code will be escaped (such as \x9f).