Animate Image over background by a deffined curve.

Hello, I think of way how to animate a car moving by a user deffined curve. I have the matrix X,Y cordinates of the curve. I tried a few ways. For example to make a new axis over the old one with the background. But when I start animation the car moves by a strange curve. The curve is obviosly the same but it is moved. here is some code:

for n=1:1:numel(X)

set(newAxes,'position',[X(n) Y(n) 0.045 0.027])
pause(0.1)
drawnow 
n = n+1;     
end
With this code the car moves by a shifted curve. I suppose this is because position is measured in the rectangle [0 0 1 1]. Can I some how use this axes over axes to create the required animation?

Another aproach is:

Image1(row1:row2, col1:col2) = imrotate(Image2,-90,'bilinear','crop'); imshow(Image1); where i put the car image over the background. But I can't further animate it... It would be nice if some one could help me with some examples! Thank you.