Try this ...
#include "Tlc5940.h"
const uint16_t pattern = 0b0000/ // ignore these 3-bits
111/
101/
101/
111;
void SetLEDArrayMode(uint16_t pattern, uint16_t luminance)
{
Tlc.clear();
for ( int mask = 0b0000100000000000, chan = 0; mask; mask >>= 1, chan++ )
{
Tlc.set(chan, ((pattern & mask) ? luminance : 0 ));
}
Tlc.update();
}
void loop()
{
// 12-bit luminance, 0 - 4095
int luminance = 4095; // full brightness
SetLEDArrayMode(pattern, luminance);
}
void setup()
{
Tlc.init(0);
}