#version 310 es
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

layout(binding = 0, std430) buffer SSBO
{
    vec4 data[];
} ssbos[2];

void main()
{
    uint ident = gl_GlobalInvocationID.x;
    ssbos[1].data[ident] = ssbos[0].data[ident];
}