set terminal png size 1800,768 enhanced font ,12
set output 'velocity.png'
set datafile separator whitespace
#set object 1 rect from 8.5,1.5 to 11.5,2.5 lw 5


plot 'velocity.dat' using 1:2:3:4:5 with vectors filled head size 0.01,20,60 lc palette
