Command_block

Did you mean to attach a video? Without it, there isn't enough information for understand your problem.

Your chain ("cadena") command blocks don't work because they are conditional and the repeat command block is failing. A conditional command block only executes when a command block that points to it succeeds.

The repeat command block is failing because it is not detecting an entity within a 1-block radius of the point X=14, Y=4, Z=5. In 1.10 and 1.11, the precise point location set when these coordinates are used is X=14.0, Y=4.0, Z=5.0. A radius 1 circle around this point is the circle that fits in the square from X=13.5 to 14.5, Y=3.5 to 4.5, and Z=4.5 to 5.5. The on-screen position coordinates are always rounded down, so if you were standing at, for example, X=14.6, Y=4.0, Z=4.5 you would be outside the radius even though your Position display would suggest you're inside it. You might want to change those coordinates to the center of the block (X=14.5, Y=4, Z=5.5) and/or increase the radius a bit (r=1.5 might be good).

I have closed this report, as this appears to work as it's supposed to.