Particle collision with multiple primitives and changing to 1 colour value upon hit

[atron]

Hi there,

I'm trying to change the colour of a primitive once a particle collides with it….but i don't want to use an attribute transfer because that gives me a gradient of colour on the primitive and i want to change the colour back after it's been hit and have it be a solid colour. 
So hit == green (0,1,0)
not hit == red(1,0,0)
Another problem i'm having is when i don't use an attribute transfer and write it in a python sop(code below) i change all the primitives colours in one go rather than individually where the the particle collides with each primitive.

Not sure how to go about this, but here is the file attached.Any help would be much appreciated.

CODE FOR HIT COUNTER AND PRIMITIVE CHANGE COLOUR 
node = hou.pwd()
geo = node.geometry()
from hou.session import * 

inputs = node.inputs() # bring in city searcher data 

pointcolliders = inputs.geometry().points()


ship = geo.prims()
if hou.frame() == 1: 
hitCount = 0


for p in pointcolliders:

store = p.attribValue(“hittotal”) # get hittotal attribute from the pop solver 
hitCount += store # hitcount += store (to add number of hits to hou.session)
hits = store 


green = (0.0,1.0,0.0)
red = (1.0,0.0,0.0)

#change colour of second input so object

for s in ship:

if hits == 1:
s.setAttribValue('Cd', green) 
else:
s.setAttribValue('Cd', red)

particles hit each prim.hipnc