I want to plot the position of Spherical pendulum.

First I tried to plot the simple pendulum:

DSolve[{y''[t] == -y[t], y[0] == Pi/2, y'[0] == 0}, y[t], t] (* {{y[t] -> 1/2 Pi Cos[t]}} *) 

then manipulate $t$

Manipulate[ ParametricPlot[{Sin[ 1/2 Pi Cos[t]], -Cos[1/2 Pi Cos[t]]}, {t, 0, n}, PlotRange -> 1,PlotStyle -> Red], {n, 0.1, 2Pi, 0.01}] 

I want to do same thing for spherical pendulum.

These are differential equations of the spherical pendulum page,3

sys := {θ''[t] == ϕ'[t]^2 Cos[θ[t]] - g/l Sin[θ[t]], ϕ''[t] == (-2 ϕ'[t] θ'[t] Cos[θ[t]])/Sin[θ[t]]} 

with initial condition

ic := {θ[0] == π/2, θ'[0] == 0, ϕ[0] == π/2, ϕ'[0] == 1} 

I tried:

sol = NDSolve[{θ''[t] == ϕ'[t]^2 Cos[θ[t]] - g/l Sin[θ[t]], ϕ''[t] == (-2 ϕ'[t] θ'[t] Cos[θ[t]])/Sin[θ[t]], θ[0] == π/2, θ'[0] == 0, ϕ[0] == π/2, ϕ'[0] == 1} /. {g -> 9.81, l -> 1}, {θ, ϕ}, {t, 0, 10}] x[t_] := Evaluate[(Sin[θ[t]] Cos[ϕ[t]]) /. sol] y[t_] := Evaluate[(Sin[θ[t]] Sin[ϕ[t]]) /. sol] z[t_] := Evaluate[Cos[θ] /. sol] ParametricPlot3D[{x[t], y[t], z[t]}, {θ, 0, 2 π}, {ϕ, -π, π}] 

but it doesn't work