Question: How do I plot this equation on a direction field

I am trying to plot the equation diff(P(t),t) = P(t)*(7-P(t))-10 on a direction field but I keep getting this error code: Error, (in DEtools/DEplot/CheckDE) extra unknowns found: YP[2].

This is what i have entered in:    

DEplot(diff(P(t),t) = P(t)*(7-P(t))-10,P(t),t=-10..10,P=-10..10,scene=[P,P(t)],conditions,number=1, stepsize=.01);
 

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