Wave Pulse

A1=1;A2=0.5;A3=0.7;b1=0;b2=-8;b3=9;c1=5;c2=3;c3=6;
Manipulate[
Plot[
A1*(E^((-((((x-b1-t))^2)/(c1^2)))))+A2*(E^((-((((x-b2-t))^2)/(c2^2)))))+A3*(E^((-((((x-b3-t))^2)/(c3^2))))),{x,-50,50},
ImageSize->1000,
PlotRange->{{-50,50},{-2,2}},
PlotStyle->{RGBColor[0, 0.501961, 1],Thickness[0.005]},
Mesh->{Range[-50,50,25]},
MeshStyle->{PointSize[.015],Red}
],
{{t,-70},-70,65,1,ControlType-> Animator, AnimationRunning-> False}
]